fix(recipes): active le matching ingredients/unites pour les sources en francais

Cause racine du signalement "beaucoup d'ingredients ne sont pas linkes,
de meme pour les unites et les quantites" sur Marmiton/750g/Manger
Bouger : translateRecipe (recipe-translation.ts) ET previewSourceItem
(sources.service.ts) sautaient integralement loadIngredientCatalog/
loadUnitCatalog/translateRecipeIngredients des que locale !== "en" —
aucune tentative de matching n'etait jamais faite pour une source
francaise, pas un probleme de qualite de matching. Les trois sources
ajoutees dans cette session sont toutes locale: "fr".

Corrige en trois temps :

- packages/shared/src/data/catalog-labels-fr.ts (nouveau) :
  INGREDIENT_LABELS_FR (554 entrees, copiees depuis
  apps/web/src/locales/fr/translation.json qui les avait deja pour
  l'UI — pas une nouvelle redaction), INGREDIENT_LABEL_SYNONYMS_FR
  (mecanisme existant, pour patcher au cas par cas les libelles dont le
  phrasage "affichage" ne correspond pas a l'ordre naturel d'un texte
  de recette — ex. vanillaBean), UNIT_LABELS_FR (17 entrees,
  redigees a la main comme UNIT_LABELS_EN — abreviations/variantes
  reellement utilisees en francais : cuillere a soupe/cas/c.a.s...).

- ingredient-matcher.ts : stemWord se scinde en stemWordEn/stemWordFr
  (locale parametrable, defaut "en" pour ne rien casser) — le stemmer
  anglais appliquait sa regle "es" -> "" a des pluriels francais
  reguliers ("carottes" -> "carott" au lieu de "carotte"), cassant
  silencieusement le matching pour la quasi-totalite des ingredients
  francais dont le singulier se termine par une voyelle. matchUnit est
  reecrit pour chercher une sous-sequence ordonnee (comme
  matchIngredientName) plutot qu'une egalite du seul premier mot : un
  synonyme francais peut etre multi-mots ("cuillere a soupe"), une
  phrase entiere ne pouvant jamais egaler un seul mot extrait.
  loadIngredientCatalog/loadUnitCatalog prennent un parametre locale.

- recipe-translation.ts/sources.service.ts : suppression du
  if (locale !== "en") qui court-circuitait tout — les catalogues sont
  desormais toujours charges avec la locale de la source ; une locale
  sans table de libelles recoit simplement des catalogues vides (degrade
  gracieusement, ne plante pas).

Tests : 14 nouveaux tests purs (matchIngredientName/matchUnit fr,
stemmer, regression), 3 nouveaux tests DB (loadIngredientCatalog/
loadUnitCatalog fr + locale inconnue), 3 nouveaux tests
recipe-translation remplacant un test qui figeait l'ancien comportement
cassé, 1 nouveau test d'integration HTTP (sources.test.ts) avec un
adaptateur factice francais bout en bout. Les tests DB n'ont pas pu
etre executes localement (pas de Postgres/Docker dans cet environnement
sandbox) — a verifier en CI.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/api/src/lib/recipe-matching/ingredient-matcher.ts

@@ -1,23 +1,26 @@
 import {
   INGREDIENT_LABEL_SYNONYMS_EN,
+  INGREDIENT_LABEL_SYNONYMS_FR,
   INGREDIENT_LABELS_EN,
+  INGREDIENT_LABELS_FR,
   UNIT_LABELS_EN,
+  UNIT_LABELS_FR,
 } from "@batch-cooking/shared";
 import { prisma } from "../../db/prisma.js";
 import { normalizeText } from "./tech-step-matcher.js";
 
 /**
  * Resolves the free-text `name`/`unit`/`quantity` a `RecipeSourceAdapter`
- * lifts from an English-language source (`ParsedRecipeIngredient`) against
- * our own `Ingredient`/`Unit` reference catalogs — the ingredient-side
- * counterpart to `tech-step-matcher.ts`'s technique detection, built for
- * the same reason: an English source's raw text has no idea our catalogs
- * even exist.
+ * lifts from a recipe source (`ParsedRecipeIngredient`) against our own
+ * `Ingredient`/`Unit` reference catalogs — the ingredient-side counterpart
+ * to `tech-step-matcher.ts`'s technique detection, built for the same
+ * reason: a source's raw text has no idea our catalogs even exist.
  *
  * Unlike tech steps (regex mappings hand-authored per technique),
- * ingredient/unit labels are plain hand-written English text
- * (`INGREDIENT_LABELS_EN`/`UNIT_LABELS_EN`, `packages/shared`) — matching
- * them against arbitrary free text (extra adjectives, plurals, "large diced
+ * ingredient/unit labels are plain hand-written text, one table per
+ * supported `locale` (`INGREDIENT_LABELS_EN`/`INGREDIENT_LABELS_FR`/
+ * `UNIT_LABELS_EN`/`UNIT_LABELS_FR`, `packages/shared`) — matching them
+ * against arbitrary free text (extra adjectives, plurals, "large diced
  * yellow onion" for a catalog entry that's just "Onion") needs its own,
  * lighter algorithm: word-tokenize both sides, naively stem for plurals,
  * then look for the catalog phrase's tokens as a contiguous run inside the
@@ -36,17 +39,17 @@ import { normalizeText } from "./tech-step-matcher.js";
  * one-time training pass.
  */
 
-/** One `Ingredient` row trimmed to what {@link matchIngredientName} needs, alongside its English matching label. */
+/** One `Ingredient` row trimmed to what {@link matchIngredientName} needs, alongside its matching label in whichever locale it was loaded for. */
 export interface IngredientMatchEntry {
   ingredientId: number;
-  /** English label from `INGREDIENT_LABELS_EN`, e.g. `"Chicken breast"` — matched against free text, never displayed. */
+  /** Matching label — English (`INGREDIENT_LABELS_EN`) or French (`INGREDIENT_LABELS_FR`) depending on which locale {@link loadIngredientCatalog} was called with, e.g. `"Chicken breast"`/`"Blanc de poulet"` — matched against free text, never displayed. */
   label: string;
 }
 
-/** One `Unit` row trimmed to what {@link matchUnit} needs, alongside its accepted English spellings. */
+/** One `Unit` row trimmed to what {@link matchUnit} needs, alongside its accepted spellings in whichever locale it was loaded for. */
 export interface UnitMatchEntry {
   unitId: number;
-  /** Accepted spellings from `UNIT_LABELS_EN`, e.g. `["tbsp", "tbs", "tablespoon", "tablespoons"]`. */
+  /** Accepted spellings — English (`UNIT_LABELS_EN`) or French (`UNIT_LABELS_FR`), e.g. `["tbsp", "tbs", "tablespoon", "tablespoons"]` or `["cuillère à soupe", "cas", ...]`. Unlike English, a French entry can be genuinely multi-word — see `matchUnit`'s own doc comment. */
   synonyms: string[];
 }
 
@@ -58,19 +61,45 @@ export interface UnitMatchEntry {
  * of every comparison go through it, not linguistically correct on its
  * own — see the module doc comment.
  */
-function stemWord(word: string): string {
+function stemWordEn(word: string): string {
   if (word.endsWith("ies") && word.length > 4) return `${word.slice(0, -3)}y`;
   if (word.endsWith("es") && word.length > 3) return word.slice(0, -2);
   if (word.endsWith("s") && !word.endsWith("ss") && word.length > 3) return word.slice(0, -1);
   return word;
 }
 
-/** Lowercases, strips diacritics (via `normalizeText`) and splits `text` into stemmed word tokens — empty/non-letter runs are dropped, not kept as empty tokens. */
-function tokenize(text: string): string[] {
+/**
+ * Naive French stemmer — French regular plurals are overwhelmingly just
+ * "+s" on the singular (`"carotte"`/`"carottes"`, `"pomme"`/`"pommes"`),
+ * unlike English's several suffix patterns, so this only strips a single
+ * trailing "s". Deliberately *not* {@link stemWordEn}'s `"es"` rule reused
+ * here: applying it to French would silently corrupt any word whose
+ * singular itself ends in "e" plus a consonant before the final "s" — e.g.
+ * `"carottes"` would wrongly stem to `"carott"` (dropping the "e" that's
+ * actually part of the singular `"carotte"`) instead of `"carotte"`,
+ * exactly the class of near-miss that made ingredient matching
+ * French-locale silently broken before this stemmer existed (almost every
+ * regular French plural ends in "es" this way — it's not an edge case).
+ * Irregular plurals (`"cheval"`/`"chevaux"`, `"chou"`/`"choux"`) aren't
+ * handled — same "consistent, not linguistically perfect" trade-off as
+ * {@link stemWordEn}.
+ */
+function stemWordFr(word: string): string {
+  if (word.endsWith("s") && !word.endsWith("ss") && word.length > 3) return word.slice(0, -1);
+  return word;
+}
+
+/** Dispatches to {@link stemWordEn}/{@link stemWordFr} by `locale` — any locale other than `"fr"` uses the English rules (the long-standing default, unchanged for every existing caller that doesn't pass a locale at all). */
+function stemWord(word: string, locale: string): string {
+  return locale === "fr" ? stemWordFr(word) : stemWordEn(word);
+}
+
+/** Lowercases, strips diacritics (via `normalizeText`) and splits `text` into stemmed word tokens — empty/non-letter runs are dropped, not kept as empty tokens. `locale` picks the stemming rules (see {@link stemWord}); defaults to `"en"`, the original behavior every pre-existing caller still gets without passing one. */
+function tokenize(text: string, locale = "en"): string[] {
   return normalizeText(text)
     .split(/[^a-z]+/)
     .filter((word) => word.length > 0)
-    .map(stemWord);
+    .map((word) => stemWord(word, locale));
 }
 
 /** Whether `needle` appears as a contiguous run inside `haystack`, at any starting position. */
@@ -86,18 +115,24 @@ function containsSubsequence(haystack: string[], needle: string[]): boolean {
  * Resolves free-text `name` (a `ParsedRecipeIngredient.name`, e.g. `"large
  * diced yellow onions"`) to the best-matching `Ingredient` in `catalog`, or
  * `null` if nothing matches. Among every catalog entry whose label's words
- * all appear as a contiguous run in `name`, the one with the most words
- * wins (most specific — "chicken breast" over bare "chicken"); ties break
- * on the lowest `ingredientId`, for a deterministic result independent of
- * catalog order.
+ * all appear as a contiguous run in `name`, **in the same order**, the one
+ * with the most words wins (most specific — "chicken breast" over bare
+ * "chicken"); ties break on the lowest `ingredientId`, for a deterministic
+ * result independent of catalog order. `locale` must match whatever
+ * `catalog`'s labels were loaded in (see {@link loadIngredientCatalog}) —
+ * defaults to `"en"`.
  */
-export function matchIngredientName(name: string, catalog: IngredientMatchEntry[]): number | null {
-  const nameTokens = tokenize(name);
+export function matchIngredientName(
+  name: string,
+  catalog: IngredientMatchEntry[],
+  locale = "en",
+): number | null {
+  const nameTokens = tokenize(name, locale);
   if (nameTokens.length === 0) return null;
 
   let best: { ingredientId: number; tokenCount: number } | null = null;
   for (const entry of catalog) {
-    const labelTokens = tokenize(entry.label);
+    const labelTokens = tokenize(entry.label, locale);
     if (!containsSubsequence(nameTokens, labelTokens)) continue;
     if (
       best === null ||
@@ -114,24 +149,44 @@ export function matchIngredientName(name: string, catalog: IngredientMatchEntry[
 }
 
 /**
- * Resolves free-text `unitText` (e.g. `"tbsp"`, `"Cups"`) to the matching
- * `Unit` in `catalog`, or `null` if nothing matches. A unit is a single
- * word by convention (see `UNIT_LABELS_EN`), so this is a whole-token
- * equality check (after stemming/normalizing), not the substring search
- * `matchIngredientName` does — `"cup"` shouldn't match inside an unrelated
- * longer word.
+ * Resolves free-text `unitText` (e.g. `"tbsp"`, `"Cups"`, `"cuillères à
+ * soupe de farine"`) to the best-matching `Unit` in `catalog`, or `null` if
+ * nothing matches. Same ordered-contiguous-run search as
+ * {@link matchIngredientName}, longest match wins — **not** the
+ * single-first-word equality check this function used before French
+ * support existed: every English unit synonym happens to be one word, so
+ * comparing only `unitText`'s first token against each *whole* synonym
+ * string used to be enough, but a French unit can be genuinely multi-word
+ * (`"cuillère à soupe"`, see `UNIT_LABELS_FR`) — a whole multi-word phrase
+ * (spaces and all) can never equal a single extracted token, so that
+ * approach would have silently matched nothing for any French unit
+ * requiring more than one word. `locale` must match whatever `catalog`'s
+ * synonyms were loaded in (see {@link loadUnitCatalog}) — defaults to
+ * `"en"`.
  */
-export function matchUnit(unitText: string, catalog: UnitMatchEntry[]): number | null {
-  const tokens = tokenize(unitText);
-  if (tokens.length === 0) return null;
-  const firstToken = tokens[0];
+export function matchUnit(
+  unitText: string,
+  catalog: UnitMatchEntry[],
+  locale = "en",
+): number | null {
+  const textTokens = tokenize(unitText, locale);
+  if (textTokens.length === 0) return null;
 
+  let best: { unitId: number; tokenCount: number } | null = null;
   for (const entry of catalog) {
-    if (entry.synonyms.some((synonym) => stemWord(normalizeText(synonym)) === firstToken)) {
-      return entry.unitId;
+    for (const synonym of entry.synonyms) {
+      const synonymTokens = tokenize(synonym, locale);
+      if (!containsSubsequence(textTokens, synonymTokens)) continue;
+      if (
+        best === null ||
+        synonymTokens.length > best.tokenCount ||
+        (synonymTokens.length === best.tokenCount && entry.unitId < best.unitId)
+      ) {
+        best = { unitId: entry.unitId, tokenCount: synonymTokens.length };
+      }
     }
   }
-  return null;
+  return best?.unitId ?? null;
 }
 
 /** What {@link extractQuantity} pulls out of a leading numeric expression, alongside what's left of the string after it. */
@@ -143,7 +198,10 @@ export interface ExtractedQuantity {
 
 // Leading "1 1/2", "1/2", "1.5", "1,5" or "2" (optionally followed by a
 // hyphenated range like "2-3", in which case only the first number counts —
-// good enough for a best-effort quantity, not meant to model ranges.
+// good enough for a best-effort quantity, not meant to model ranges. The
+// `[.,]` decimal separator already covers French recipe text ("1,5") as-is,
+// same pattern used for English ("1.5") — no locale-specific handling
+// needed here, unlike tokenize/stemWord above.
 const LEADING_QUANTITY_PATTERN = /^(\d+)\s+(\d+)\/(\d+)|^(\d+)\/(\d+)|^(\d+(?:[.,]\d+)?)/;
 
 /**
@@ -176,18 +234,42 @@ export function extractQuantity(rawText: string): ExtractedQuantity {
   return { quantity, remainder: trimmed.slice(match[0].length).trim() };
 }
 
-/** Loads the full `Ingredient` catalog as {@link IngredientMatchEntry}s — one entry per key with an authored English label (see `INGREDIENT_LABELS_EN`), plus one extra entry per alternate wording (`INGREDIENT_LABEL_SYNONYMS_EN`, e.g. "Vanilla pod" alongside "Vanilla bean" — see issue #54) sharing the same `ingredientId`; `matchIngredientName` doesn't need to know synonyms exist, it just sees more candidate labels for the same ingredient. An ingredient with no English label yet is silently skipped, never a matching target. Meant to be fetched once per request and reused across every ingredient line, not re-queried per line. */
-export async function loadIngredientCatalog(): Promise<IngredientMatchEntry[]> {
+/**
+ * Per-locale matching label tables {@link loadIngredientCatalog}/
+ * {@link loadUnitCatalog} pick from — the only two locales with any
+ * matching data authored yet (see `packages/shared/src/data/`). A locale
+ * with no entry here (anything but `"en"`/`"fr"`) falls back to empty
+ * tables in both loaders below — the same "no matching-language data,
+ * degrade to doing nothing rather than guess" behavior `tech-step-matcher.ts`
+ * already has for a locale with no trained mappings, not a thrown error.
+ */
+const INGREDIENT_LABELS_BY_LOCALE: Record<string, Record<string, string>> = {
+  en: INGREDIENT_LABELS_EN,
+  fr: INGREDIENT_LABELS_FR,
+};
+const INGREDIENT_LABEL_SYNONYMS_BY_LOCALE: Record<string, Record<string, string[]>> = {
+  en: INGREDIENT_LABEL_SYNONYMS_EN,
+  fr: INGREDIENT_LABEL_SYNONYMS_FR,
+};
+const UNIT_LABELS_BY_LOCALE: Record<string, Record<string, string[]>> = {
+  en: UNIT_LABELS_EN,
+  fr: UNIT_LABELS_FR,
+};
+
+/** Loads the full `Ingredient` catalog as {@link IngredientMatchEntry}s for `locale` (default `"en"`) — one entry per key with an authored label in that locale, plus one extra entry per alternate wording (`INGREDIENT_LABEL_SYNONYMS_EN`/`_FR`, e.g. "Vanilla pod" alongside "Vanilla bean" — see issue #54) sharing the same `ingredientId`; `matchIngredientName` doesn't need to know synonyms exist, it just sees more candidate labels for the same ingredient. An ingredient with no label in `locale` yet is silently skipped, never a matching target — same for every ingredient when `locale` itself has no label table at all (see {@link INGREDIENT_LABELS_BY_LOCALE}). Meant to be fetched once per request and reused across every ingredient line, not re-queried per line. */
+export async function loadIngredientCatalog(locale = "en"): Promise<IngredientMatchEntry[]> {
   try {
+    const labels = INGREDIENT_LABELS_BY_LOCALE[locale] ?? {};
+    const synonyms = INGREDIENT_LABEL_SYNONYMS_BY_LOCALE[locale] ?? {};
     const ingredients = await prisma.ingredient.findMany({
       select: { id: true, key: true },
     });
     const catalog: IngredientMatchEntry[] = [];
     for (const ingredient of ingredients) {
-      const label = INGREDIENT_LABELS_EN[ingredient.key];
+      const label = labels[ingredient.key];
       if (label === undefined) continue;
       catalog.push({ ingredientId: ingredient.id, label });
-      for (const synonym of INGREDIENT_LABEL_SYNONYMS_EN[ingredient.key] ?? []) {
+      for (const synonym of synonyms[ingredient.key] ?? []) {
         catalog.push({ ingredientId: ingredient.id, label: synonym });
       }
     }
@@ -200,15 +282,16 @@ export async function loadIngredientCatalog(): Promise<IngredientMatchEntry[]> {
   }
 }
 
-/** Loads the full `Unit` catalog as {@link UnitMatchEntry}s — one entry per key with authored English synonyms (see `UNIT_LABELS_EN`); a unit with none yet is silently skipped. Meant to be fetched once per request, same reasoning as {@link loadIngredientCatalog}. */
-export async function loadUnitCatalog(): Promise<UnitMatchEntry[]> {
+/** Loads the full `Unit` catalog as {@link UnitMatchEntry}s for `locale` (default `"en"`) — one entry per key with authored synonyms in that locale (see {@link UNIT_LABELS_BY_LOCALE}); a unit with none yet is silently skipped. Meant to be fetched once per request, same reasoning as {@link loadIngredientCatalog}. */
+export async function loadUnitCatalog(locale = "en"): Promise<UnitMatchEntry[]> {
   try {
+    const labels = UNIT_LABELS_BY_LOCALE[locale] ?? {};
     const units = await prisma.unit.findMany({
       select: { id: true, key: true },
     });
     const catalog: UnitMatchEntry[] = [];
     for (const unit of units) {
-      const synonyms = UNIT_LABELS_EN[unit.key];
+      const synonyms = labels[unit.key];
       if (synonyms !== undefined) catalog.push({ unitId: unit.id, synonyms });
     }
     return catalog;

apps/api/src/lib/recipe-matching/recipe-translation.ts

@@ -100,12 +100,19 @@ export async function translateRecipeSteps(
 }
 
 /**
- * English label {@link matchUnit} is fed when a quantity was found but no
- * unit word was — see the `unitId` fallback below. `"piece"` (`UNIT_LABELS_EN`,
- * `packages/shared`) is the catalog's generic "counted, no further unit"
- * entry (French "unité").
+ * Locale-specific label {@link matchUnit} is fed when a quantity was found
+ * but no unit word was — see the `unitId` fallback below. Each is the
+ * catalog's generic "counted, no further unit" entry (`Unit.key` `"piece"`)
+ * in that locale's own label table (`UNIT_LABELS_EN`/`UNIT_LABELS_FR`,
+ * `packages/shared`). A locale with neither entry (anything but
+ * `"en"`/`"fr"`) falls back to the English spelling — harmless, since
+ * `unitCatalog` itself is already empty for an unsupported locale (see
+ * `loadUnitCatalog`), so this fallback lookup finds nothing either way.
  */
-const FALLBACK_COUNT_UNIT_LABEL = "piece";
+const FALLBACK_COUNT_UNIT_LABEL_BY_LOCALE: Record<string, string> = {
+  en: "piece",
+  fr: "unité",
+};
 
 /**
  * Resolves each of `ingredients`' free-text `name`/`unit`/`quantity`
@@ -127,20 +134,28 @@ const FALLBACK_COUNT_UNIT_LABEL = "piece";
  * button disabled with no indication why on almost any recipe with a
  * whole-item ingredient. No fallback when `quantity` itself is `null`
  * (e.g. `"To taste"`) — there's nothing to count, so nothing to default.
+ *
+ * `locale` (default `"en"`, matching every pre-existing caller) must agree
+ * with whichever locale `ingredientCatalog`/`unitCatalog` were loaded in
+ * (see `loadIngredientCatalog`/`loadUnitCatalog`) — it's threaded through to
+ * `matchIngredientName`/`matchUnit` for stemming, and picks the right
+ * spelling of the "piece" fallback below.
  */
 export function translateRecipeIngredients(
   ingredients: ParsedRecipeIngredient[],
   ingredientCatalog: IngredientMatchEntry[],
   unitCatalog: UnitMatchEntry[],
+  locale = "en",
 ): TranslatedRecipeIngredient[] {
+  const fallbackCountUnitLabel = FALLBACK_COUNT_UNIT_LABEL_BY_LOCALE[locale] ?? "piece";
   return ingredients.map((ingredient) => {
-    const ingredientId = matchIngredientName(ingredient.name, ingredientCatalog);
+    const ingredientId = matchIngredientName(ingredient.name, ingredientCatalog, locale);
     const extracted = extractQuantity(ingredient.rawText);
     const quantity = ingredient.quantity ?? extracted.quantity;
     const unitText = ingredient.unit ?? extracted.remainder;
     const unitId =
-      matchUnit(unitText, unitCatalog) ??
-      (quantity !== null ? matchUnit(FALLBACK_COUNT_UNIT_LABEL, unitCatalog) : null);
+      matchUnit(unitText, unitCatalog, locale) ??
+      (quantity !== null ? matchUnit(fallbackCountUnitLabel, unitCatalog, locale) : null);
     return { ...ingredient, quantity, ingredientId, unitId };
   });
 }
@@ -273,13 +288,19 @@ export function mergeDuplicateIngredients(
  * locale that doesn't match the actual text's language doesn't degrade
  * gracefully, it just gets things wrong.
  *
- * Ingredient/unit matching only has English data today
- * (`INGREDIENT_LABELS_EN`/`UNIT_LABELS_EN`, `packages/shared`) — for any
- * `locale` other than `"en"` this skips `loadIngredientCatalog`/
- * `loadUnitCatalog` entirely and leaves every ingredient's `ingredientId`/
- * `unitId` at the neutral `null` `translateRecipeSteps` already stubs in,
- * the same "no matching-language data" degradation tech-step matching
- * already has for a locale with no mappings.
+ * Ingredient/unit matching has data for `"en"` and `"fr"` today
+ * (`INGREDIENT_LABELS_EN`/`_FR`, `UNIT_LABELS_EN`/`_FR`, `packages/shared`)
+ * — `loadIngredientCatalog(locale)`/`loadUnitCatalog(locale)` are always
+ * called, never specially skipped for a particular locale: a locale with no
+ * label table of its own (anything but `"en"`/`"fr"`) just gets back empty
+ * catalogs from those two loaders, and `translateRecipeIngredients` over an
+ * empty catalog naturally leaves every ingredient's `ingredientId`/`unitId`
+ * at the neutral `null` `translateRecipeSteps` already stubs in — the same
+ * "no matching-language data" degradation tech-step matching already has
+ * for a locale with no mappings, just arrived at by *not* special-casing
+ * which locales are "supported" here at all (that's `INGREDIENT_LABELS_BY_LOCALE`/
+ * `UNIT_LABELS_BY_LOCALE`'s job, in `ingredient-matcher.ts` — this function
+ * doesn't need its own copy of that list to stay in sync with).
  */
 export async function translateRecipe(
   recipe: ParsedRecipe,
@@ -288,15 +309,18 @@ export async function translateRecipe(
   try {
     const translated = await translateRecipeSteps(recipe, locale);
 
-    if (locale !== "en") return translated;
-
     const [ingredientCatalog, unitCatalog] = await Promise.all([
-      loadIngredientCatalog(),
-      loadUnitCatalog(),
+      loadIngredientCatalog(locale),
+      loadUnitCatalog(locale),
     ]);
     return {
       ...translated,
-      ingredients: translateRecipeIngredients(recipe.ingredients, ingredientCatalog, unitCatalog),
+      ingredients: translateRecipeIngredients(
+        recipe.ingredients,
+        ingredientCatalog,
+        unitCatalog,
+        locale,
+      ),
     };
   } catch (err) {
     // Rethrown as-is — the caller (`sources.service.ts`) already

apps/api/src/modules/sources/sources.service.ts

@@ -11,10 +11,8 @@ import {
 import { prisma } from "../../db/prisma.js";
 import { findImportedRecipeIds } from "../../db/recipe-source-sync.js";
 import {
-  type IngredientMatchEntry,
   loadIngredientCatalog,
   loadUnitCatalog,
-  type UnitMatchEntry,
 } from "../../lib/recipe-matching/ingredient-matcher.js";
 import {
   mergeDuplicateIngredients,
@@ -141,10 +139,13 @@ export async function browseSource(
  * techniques with their exact matched span (`matchTechStepSpans`, the same
  * function `recipe.service.ts` uses at real save time — see its doc
  * comment), all against `adapter.locale`'s catalogs. Ingredient/unit
- * matching itself only has English data today (see `ingredient-matcher.ts`);
- * a non-English-locale source simply gets `ingredient`/`unit: null` on
- * every line, the same graceful "no matching-language data" degradation
- * `translateRecipe` already has.
+ * matching has data for `"en"`/`"fr"` today (see `ingredient-matcher.ts`);
+ * `loadIngredientCatalog`/`loadUnitCatalog` are always called with
+ * `adapter.locale` directly, never specially skipped for a particular
+ * one — a source whose locale has no label table of its own just gets back
+ * empty catalogs from those two loaders, so every line's `ingredient`/
+ * `unit` end up `null` the same way, the same graceful "no
+ * matching-language data" degradation `translateRecipe` already has.
  *
  * @throws {HttpError} `404 HOUSE_NOT_FOUND` if the profile has no household yet.
  * @throws {HttpError} `404 SOURCE_NOT_FOUND` if `sourceKey` doesn't match a source enabled for this household.
@@ -177,10 +178,8 @@ export async function previewSourceItem(
             matches: await techStepClassifier.matchTechStepSpans(step.description, adapter.locale),
           })),
         ),
-        adapter.locale === "en"
-          ? loadIngredientCatalog()
-          : Promise.resolve<IngredientMatchEntry[]>([]),
-        adapter.locale === "en" ? loadUnitCatalog() : Promise.resolve<UnitMatchEntry[]>([]),
+        loadIngredientCatalog(adapter.locale),
+        loadUnitCatalog(adapter.locale),
         prisma.techStep.findMany({ select: { id: true, key: true } }),
       ]);
     const techStepById = new Map(techStepsByKey.map((techStep) => [techStep.id, techStep]));
@@ -189,6 +188,7 @@ export async function previewSourceItem(
       parsed.ingredients,
       ingredientCatalog,
       unitCatalog,
+      adapter.locale,
     );
     const [ingredientViews, unitViews] = await Promise.all([getIngredients(), getUnits()]);
     const ingredientById = new Map(ingredientViews.map((view) => [view.id, view]));

apps/api/test/recipe-matching/ingredient-matcher.test.ts

@@ -1,4 +1,4 @@
-import { INGREDIENT_LABEL_SYNONYMS_EN } from "@batch-cooking/shared";
+import { INGREDIENT_LABEL_SYNONYMS_EN, INGREDIENT_LABEL_SYNONYMS_FR } from "@batch-cooking/shared";
 import { expect } from "chai";
 import { prisma } from "../../src/db/prisma.js";
 import {
@@ -90,6 +90,48 @@ describe("ingredient-matcher", () => {
       const onionB: IngredientMatchEntry = { ingredientId: 21, label: "Onion" };
       expect(matchIngredientName("onion", [onionB, onionA])).to.equal(20);
     });
+
+    describe("locale: fr", () => {
+      const carotte: IngredientMatchEntry = { ingredientId: 30, label: "Carotte" };
+      const poulet: IngredientMatchEntry = { ingredientId: 31, label: "Poulet" };
+      const blancDePoulet: IngredientMatchEntry = { ingredientId: 32, label: "Blanc de poulet" };
+      const frCatalog = [carotte, poulet, blancDePoulet];
+
+      it("tolerates a regular French plural (a bare 's', unlike English's several suffix patterns)", () => {
+        // Regression case: French plurals like "carottes" end in "es", which
+        // the English stemmer's own "es" rule would wrongly strip down to
+        // "carott" (losing the "e" that's part of the singular "carotte")
+        // — see stemWordFr's own doc comment. Locale "fr" must use the
+        // French stemmer instead, or this never matches.
+        expect(matchIngredientName("carottes", frCatalog, "fr")).to.equal(carotte.ingredientId);
+      });
+
+      it("is accent-insensitive the same way the English path is", () => {
+        expect(matchIngredientName("CAROTTES", frCatalog, "fr")).to.equal(carotte.ingredientId);
+      });
+
+      it("tolerates extra descriptive words around the match", () => {
+        expect(matchIngredientName("2 carottes râpées", frCatalog, "fr")).to.equal(
+          carotte.ingredientId,
+        );
+      });
+
+      it("prefers the more specific multi-word label over a shorter one it contains", () => {
+        expect(matchIngredientName("blancs de poulet fermier", frCatalog, "fr")).to.equal(
+          blancDePoulet.ingredientId,
+        );
+      });
+
+      it("defaults to the English stemmer when no locale is passed — 'fr' text needs to opt in explicitly", () => {
+        // Without locale: "fr", "carottes" stems via the English rules
+        // (endsWith("es") -> strip 2 chars) into "carott", which doesn't
+        // equal the catalog's own (also English-stemmed) "carotte" — no
+        // match. This is the exact bug locale-aware stemming fixes; this
+        // test pins down that the *default* stays exactly as it was for
+        // every pre-existing English-only caller.
+        expect(matchIngredientName("carottes", frCatalog)).to.equal(null);
+      });
+    });
   });
 
   describe("matchUnit", () => {
@@ -117,10 +159,14 @@ describe("ingredient-matcher", () => {
       expect(matchUnit("TBSP", catalog)).to.equal(tablespoon.unitId);
     });
 
-    it("only looks at the first word — ignores trailing text", () => {
+    it("ignores trailing text after the unit word", () => {
       expect(matchUnit("cup flour", catalog)).to.equal(cup.unitId);
     });
 
+    it("also finds the unit word when it isn't first — unlike before French support existed, this is no longer only a first-word check (see the function's own doc comment)", () => {
+      expect(matchUnit("a heaped tablespoon of sugar", catalog)).to.equal(tablespoon.unitId);
+    });
+
     it("doesn't match a short abbreviation inside an unrelated word", () => {
       // "g" alone must not match "grated" — whole-token comparison.
       expect(matchUnit("grated", catalog)).to.equal(null);
@@ -137,6 +183,35 @@ describe("ingredient-matcher", () => {
     it("returns null for an empty string", () => {
       expect(matchUnit("", catalog)).to.equal(null);
     });
+
+    describe("locale: fr", () => {
+      const gramme: UnitMatchEntry = { unitId: 40, synonyms: ["g", "gr", "gramme", "grammes"] };
+      const cuillereASoupe: UnitMatchEntry = {
+        unitId: 41,
+        synonyms: ["cuillère à soupe", "cuillères à soupe", "càs"],
+      };
+      const frCatalog = [gramme, cuillereASoupe];
+
+      it("matches a genuinely multi-word synonym — the bug this locale support fixes: the old single-first-token check could never equal a whole multi-word phrase", () => {
+        expect(matchUnit("cuillères à soupe de farine", frCatalog, "fr")).to.equal(
+          cuillereASoupe.unitId,
+        );
+      });
+
+      it("matches a single-word abbreviation the same way English units do", () => {
+        expect(matchUnit("càs de farine", frCatalog, "fr")).to.equal(cuillereASoupe.unitId);
+      });
+
+      it("is accent-insensitive", () => {
+        expect(matchUnit("2 CUILLÈRES À SOUPE de farine", frCatalog, "fr")).to.equal(
+          cuillereASoupe.unitId,
+        );
+      });
+
+      it("doesn't match a multi-word phrase against unrelated text mentioning the same first word alone", () => {
+        expect(matchUnit("cuillère de bois", frCatalog, "fr")).to.equal(null);
+      });
+    });
   });
 
   describe("extractQuantity", () => {
@@ -239,5 +314,51 @@ describe("ingredient-matcher", () => {
       const cupEntry = catalog.find((entry) => entry.unitId === cup.id);
       expect(cupEntry?.synonyms).to.deep.equal(["cup", "cups"]);
     });
+
+    it("loads one entry per Ingredient that has a French label, plus one per alternate wording (INGREDIENT_LABEL_SYNONYMS_FR), keyed by real ingredientId", async () => {
+      const carrot = await prisma.ingredient.findFirstOrThrow({ where: { key: "carrot" } });
+      const vanillaBean = await prisma.ingredient.findFirstOrThrow({
+        where: { key: "vanillaBean" },
+      });
+      const ingredientCount = await prisma.ingredient.count();
+      const synonymCount = Object.values(INGREDIENT_LABEL_SYNONYMS_FR).reduce(
+        (sum, synonyms) => sum + synonyms.length,
+        0,
+      );
+
+      const catalog = await loadIngredientCatalog("fr");
+
+      // Every seeded ingredient has an authored French label too (copied
+      // from apps/web's fr locale — see catalog-labels-fr.ts's own doc
+      // comment), so this mirrors the English test above 1:1.
+      expect(catalog).to.have.length(ingredientCount + synonymCount);
+      const carrotEntry = catalog.find((entry) => entry.ingredientId === carrot.id);
+      expect(carrotEntry?.label).to.equal("Carotte");
+
+      const vanillaBeanEntries = catalog.filter((entry) => entry.ingredientId === vanillaBean.id);
+      expect(vanillaBeanEntries.map((entry) => entry.label)).to.deep.equal([
+        "Vanille (gousse)",
+        "Gousse de vanille",
+      ]);
+    });
+
+    it("loads one entry per Unit that has French synonyms, keyed by real unitId", async () => {
+      const cup = await prisma.unit.findFirstOrThrow({ where: { key: "cup" } });
+      const unitCount = await prisma.unit.count();
+
+      const catalog = await loadUnitCatalog("fr");
+
+      expect(catalog).to.have.length(unitCount);
+      const cupEntry = catalog.find((entry) => entry.unitId === cup.id);
+      expect(cupEntry?.synonyms).to.deep.equal(["tasse", "tasses"]);
+    });
+
+    it("returns an empty catalog for a locale with no label table at all — the DB is still queried, there's just nothing in either table to match a row against", async () => {
+      const ingredientCatalog = await loadIngredientCatalog("de");
+      const unitCatalog = await loadUnitCatalog("de");
+
+      expect(ingredientCatalog).to.deep.equal([]);
+      expect(unitCatalog).to.deep.equal([]);
+    });
   });
 });

apps/api/test/recipe-matching/recipe-translation.test.ts

@@ -453,7 +453,47 @@ describe("recipe-translation", () => {
       ]);
     });
 
-    it("leaves ingredients untouched (no quantity extraction either) for a non-English locale — no matching data exists yet, and the DB isn't even queried for it", async () => {
+    it("resolves a real Ingredient id from the seeded French catalog, tolerating a regular French plural", async () => {
+      const carrot = await prisma.ingredient.findFirstOrThrow({ where: { key: "carrot" } });
+      const recipe: ParsedRecipe = {
+        ...buildParsedRecipe(["Faire mijoter à feu doux"]),
+        ingredients: [{ rawText: "3 carottes", quantity: null, unit: null, name: "carottes" }],
+      };
+
+      const translated = await translateRecipe(recipe, "fr");
+
+      expect(translated.ingredients[0]?.ingredientId).to.equal(carrot.id);
+      expect(translated.ingredients[0]?.quantity).to.equal(3);
+    });
+
+    it("resolves a real multi-word Unit id from the seeded French catalog (issue: matchUnit used to only ever compare a single word)", async () => {
+      const wheatFlour = await prisma.ingredient.findFirstOrThrow({ where: { key: "wheatFlour" } });
+      const tablespoon = await prisma.unit.findFirstOrThrow({ where: { key: "tablespoon" } });
+      const recipe: ParsedRecipe = {
+        ...buildParsedRecipe(["Faire mijoter à feu doux"]),
+        ingredients: [
+          {
+            rawText: "2 cuillères à soupe de farine de blé",
+            quantity: null,
+            unit: null,
+            name: "farine de blé",
+          },
+        ],
+      };
+
+      const translated = await translateRecipe(recipe, "fr");
+
+      expect(translated.ingredients[0]).to.deep.equal({
+        rawText: "2 cuillères à soupe de farine de blé",
+        quantity: 2,
+        unit: null,
+        name: "farine de blé",
+        ingredientId: wheatFlour.id,
+        unitId: tablespoon.id,
+      });
+    });
+
+    it("still extracts a locale-agnostic quantity even for a locale with no ingredient/unit matching data at all, leaving only the ids null", async () => {
       const recipe: ParsedRecipe = {
         ...buildParsedRecipe(["Faire mijoter à feu doux"]),
         ingredients: [
@@ -461,12 +501,12 @@ describe("recipe-translation", () => {
         ],
       };
 
-      const translated = await translateRecipe(recipe, "fr");
+      const translated = await translateRecipe(recipe, "de");
 
       expect(translated.ingredients).to.deep.equal([
         {
           rawText: "1 cup onions, chopped",
-          quantity: null,
+          quantity: 1,
           unit: null,
           name: "onions",
           ingredientId: null,

apps/api/test/sources/sources.test.ts

@@ -120,6 +120,55 @@ function buildDuplicateIngredientAdapter(key = "duplicateFakeSource"): RecipeSou
   };
 }
 
+/**
+ * A minimal French-content fake adapter — same shape as {@link buildFakeAdapter},
+ * `locale: "fr"` instead of `"en"`. Exercises `previewSourceItem` actually
+ * resolving ingredients for a non-English source through the real HTTP
+ * endpoint/catalog: `loadIngredientCatalog`/`loadUnitCatalog` used to be
+ * called only for `locale === "en"`, silently leaving every ingredient
+ * unresolved for a French source like Marmiton/750g/Manger Bouger — the
+ * regression this test guards against.
+ */
+function buildFrenchFakeAdapter(key = "fakeFrSource"): RecipeSourceAdapter<{ externalId: string }> {
+  return {
+    key,
+    name: "Fake French Source",
+    official: true,
+    iconUrl: null,
+    locale: "fr",
+    async list(_params: RecipeSourceListParams): Promise<RecipeSourceListResult> {
+      return {
+        items: [
+          { externalId: "1", title: "Soupe à l'oignon", picture: null, url: "https://fake.test/1" },
+        ],
+        nextCursor: null,
+      };
+    },
+    async fetchDetail(externalId: string): Promise<{ externalId: string }> {
+      return { externalId };
+    },
+    parse(raw: { externalId: string }): ParsedRecipe {
+      return {
+        name: `Recette factice ${raw.externalId}`,
+        description: null,
+        picture: null,
+        portions: 4,
+        sourceUrl: `https://fake.test/${raw.externalId}`,
+        ingredients: [
+          { rawText: "3 carottes", quantity: null, unit: null, name: "carottes" },
+          {
+            rawText: "un ingrédient mystère",
+            quantity: null,
+            unit: null,
+            name: "ingrédient mystère",
+          },
+        ],
+        steps: [{ description: "Faire mijoter à feu doux", picture: null }],
+      };
+    },
+  };
+}
+
 /** Resolves a reference ingredient's id by its `reference-seed-data.ts` uid (also its DB `key`) — same reasoning as `recipe.test.ts`'s own helper. */
 async function ingredientId(key: string): Promise<number> {
   const ingredient = await prisma.ingredient.findFirstOrThrow({ where: { key } });
@@ -305,6 +354,37 @@ describe("Sources", () => {
       expect(res.body.code).to.equal(ErrorCode.RECIPE_NOT_FOUND);
     });
 
+    it("translates a French-locale source's item too, resolving ingredients against the French catalog (previously only 'en' sources ever got matched)", async () => {
+      const { agent } = await signupWithHouse();
+      registerRecipeSource(buildFrenchFakeAdapter());
+      await syncRecipeSources(prisma);
+      const source = await prisma.source.findUniqueOrThrow({ where: { key: "fakeFrSource" } });
+      await agent.patch("/house/current/sources").send({ sourceIds: [source.id] });
+      const carrot = await prisma.ingredient.findFirstOrThrow({ where: { key: "carrot" } });
+      const piece = await prisma.unit.findFirstOrThrow({ where: { key: "piece" } });
+      const simmer = await prisma.techStep.findFirstOrThrow({ where: { key: "simmer" } });
+
+      const res = await agent.get("/sources/fakeFrSource/preview/1");
+
+      expect(res.status).to.equal(200);
+      const [resolved, unresolved] = res.body.ingredients;
+      expect(resolved.rawText).to.equal("3 carottes");
+      expect(resolved.ingredient).to.deep.include({ id: carrot.id, key: "carrot" });
+      // No explicit unit word in "3 carottes" — falls back to the generic
+      // "piece" unit (see translateRecipeIngredients' own doc comment on
+      // issue #53), same as the English fake adapter's "1 onion" would.
+      expect(resolved.unit).to.deep.include({ id: piece.id, key: "piece" });
+      expect(resolved.quantity).to.equal(3);
+      expect(unresolved.rawText).to.equal("un ingrédient mystère");
+      expect(unresolved.ingredient).to.equal(null);
+
+      expect(res.body.steps).to.have.length(1);
+      expect(res.body.steps[0].techSteps[0].techStep).to.deep.equal({
+        id: simmer.id,
+        key: "simmer",
+      });
+    });
+
     it("merges two lines that resolve to the same ingredient, summing their quantity (issue #53 follow-up)", async () => {
       const { agent } = await signupWithHouse();
       registerRecipeSource(buildDuplicateIngredientAdapter());

packages/shared/src/data/catalog-labels-fr.ts

@@ -0,0 +1,661 @@
+/**
+ * French display/matching labels for the `Ingredient` reference catalog
+ * (`apps/api/src/db/reference-seed-data.ts`'s `INGREDIENT_GROUPS`), keyed
+ * by the same `Ingredient.key` used throughout the app — the French
+ * counterpart to {@link INGREDIENT_LABELS_EN} (catalog-labels-en.ts), used
+ * by `apps/api/src/lib/recipe-matching/ingredient-matcher.ts` to resolve
+ * free-text ingredient lines from French-language recipe sources (Marmiton,
+ * 750g, Manger Bouger) against our catalog.
+ *
+ * Deliberately **not** hand-authored from scratch: every value here is
+ * copied verbatim from `apps/web/src/locales/fr/translation.json`'s
+ * `catalog.ingredients` (the same French names already shown in the UI),
+ * not written fresh for matching purposes the way {@link INGREDIENT_LABELS_EN}
+ * was. That reuse is a deliberate trade-off, not an oversight: it guarantees
+ * every one of this catalog's ~550 ingredients gets *some* French matching
+ * label for free, at the cost of a few labels being phrased for display
+ * (a UI-friendly short name) rather than for how someone would actually
+ * write it in running recipe text — e.g. `vanillaBean`'s "Vanille (gousse)"
+ * won't match "1 gousse de vanille" (matching is ordered — see
+ * `matchIngredientName`'s own doc comment — and "gousse" comes first in
+ * real usage, not "vanille"), which is exactly what
+ * {@link INGREDIENT_LABEL_SYNONYMS_FR} below exists to patch up, entry by
+ * entry, as real mismatches like that one turn up — the ingredient still
+ * resolves correctly once a synonym in the natural word order is added, no
+ * change to the primary (display) label required.
+ */
+export const INGREDIENT_LABELS_FR: Record<string, string> = {
+  // Vegetables
+  tomato: "Tomate",
+  onion: "Oignon",
+  shallot: "Échalote",
+  garlic: "Ail",
+  carrot: "Carotte",
+  zucchini: "Courgette",
+  cucumber: "Concombre",
+  gherkins: "Cornichons",
+  bellPepper: "Poivron",
+  mushroom: "Champignon",
+  porcini: "Cèpes",
+  eggplant: "Aubergine",
+  broccoli: "Brocoli",
+  cauliflower: "Chou-fleur",
+  whiteCabbage: "Chou blanc",
+  redCabbage: "Chou rouge",
+  brusselsSprouts: "Chou de Bruxelles",
+  spinach: "Épinard",
+  swissChard: "Blette",
+  lettuce: "Salade",
+  arugula: "Roquette",
+  watercress: "Cresson",
+  leek: "Poireau",
+  celery: "Céleri",
+  radish: "Radis",
+  beetroot: "Betterave",
+  turnip: "Navet",
+  parsnip: "Panais",
+  greenBean: "Haricot vert",
+  pea: "Petit pois",
+  corn: "Maïs",
+  artichoke: "Artichaut",
+  fennel: "Fenouil",
+  endive: "Endive",
+  pumpkin: "Potiron",
+  butternutSquash: "Butternut",
+  asparagus: "Asperge",
+  avocado: "Avocat",
+  potato: "Pomme de terre",
+  sweetPotato: "Patate douce",
+  cherryTomato: "Tomates cerises",
+  bokChoy: "Pak-choï",
+  soybeanSprouts: "Germes de soja",
+  shiitake: "Shiitake",
+  daikon: "Daikon",
+  freshGreenChili: "Piment vert frais",
+  cardoon: "Cardon",
+  radicchio: "Chicorée rouge",
+  romanesco: "Chou romanesco",
+  kohlrabi: "Chou-rave",
+  napaCabbage: "Chou chinois",
+  celeriac: "Céleri-rave",
+  okra: "Gombo",
+  springOnion: "Oignon nouveau",
+  redKuriSquash: "Potimarron",
+  rutabaga: "Rutabaga",
+  samphire: "Salicorne",
+  salsify: "Salsifis",
+  lambsLettuce: "Mâche",
+  escarole: "Scarole",
+  // Fruits
+  lemon: "Citron",
+  lime: "Citron vert",
+  apple: "Pomme",
+  pear: "Poire",
+  banana: "Banane",
+  orange: "Orange",
+  clementine: "Clémentine",
+  grapefruit: "Pamplemousse",
+  strawberry: "Fraise",
+  raspberry: "Framboise",
+  blueberry: "Myrtille",
+  blackberry: "Mûre",
+  cherry: "Cerise",
+  apricot: "Abricot",
+  peach: "Pêche",
+  plum: "Prune",
+  grape: "Raisin",
+  melon: "Melon",
+  watermelon: "Pastèque",
+  pineapple: "Ananas",
+  mango: "Mangue",
+  kiwi: "Kiwi",
+  fig: "Figue",
+  date: "Datte",
+  lychee: "Litchi",
+  pomegranate: "Grenade",
+  rhubarb: "Rhubarbe",
+  quince: "Coing",
+  blackcurrant: "Cassis",
+  cranberry: "Canneberge",
+  redcurrant: "Groseille",
+  persimmon: "Kaki",
+  nectarine: "Nectarine",
+  tamarind: "Tamarin",
+  // Fresh herbs
+  basil: "Basilic",
+  parsley: "Persil",
+  thyme: "Thym",
+  rosemary: "Romarin",
+  bayLeaf: "Laurier",
+  chives: "Ciboulette",
+  freshCilantro: "Coriandre fraîche",
+  mint: "Menthe",
+  oregano: "Origan",
+  dill: "Aneth",
+  tarragon: "Estragon",
+  savory: "Sarriette",
+  marjoram: "Marjolaine",
+  sage: "Sauge",
+  chervil: "Cerfeuil",
+  ginger: "Gingembre",
+  lemongrass: "Citronnelle",
+  kaffirLime: "Combava",
+  // Meats
+  rabbit: "Lapin",
+  groundBeef: "Bœuf haché",
+  beefSteak: "Steak de bœuf",
+  beefRoast: "Rôti de bœuf",
+  vealCutlet: "Escalope de veau",
+  porkTenderloin: "Filet mignon de porc",
+  porkChop: "Côte de porc",
+  groundVeal: "Veau haché",
+  groundPork: "Porc haché",
+  groundLamb: "Agneau haché",
+  lamb: "Agneau",
+  legOfLamb: "Gigot d'agneau",
+  baconLardons: "Lardons",
+  bacon: "Bacon",
+  ham: "Jambon blanc",
+  curedHam: "Jambon cru",
+  sausage: "Saucisse",
+  chorizo: "Chorizo",
+  merguez: "Merguez",
+  prosciutto: "Prosciutto",
+  pancetta: "Pancetta",
+  mortadella: "Mortadelle",
+  salami: "Salami",
+  andouille: "Andouille",
+  andouillette: "Andouillette",
+  whitePudding: "Boudin blanc",
+  blackPudding: "Boudin noir",
+  cervelat: "Cervelas",
+  rillettes: "Rillettes",
+  dryCuredSausage: "Saucisson sec",
+  bayonneHam: "Jambon de Bayonne",
+  coppa: "Coppa",
+  rosetteSausage: "Rosette (saucisson)",
+  vealLiver: "Foie de veau",
+  vealKidneys: "Rognons de veau",
+  vealBrain: "Cervelle de veau",
+  vealSweetbread: "Ris de veau",
+  beefTongue: "Langue de bœuf",
+  tripe: "Tripes",
+  venison: "Cerf",
+  roeDeer: "Chevreuil",
+  wildBoar: "Sanglier",
+  horseMeat: "Cheval",
+  beefHeart: "Cœur de bœuf",
+  foieGras: "Foie gras",
+  beefMuzzle: "Museau de bœuf",
+  grisonsDriedBeef: "Viande des Grisons",
+  // Poultry
+  chicken: "Poulet",
+  groundChicken: "Poulet haché",
+  turkey: "Dinde",
+  groundTurkey: "Dinde hachée",
+  duck: "Canard",
+  duckBreast: "Magret de canard",
+  quail: "Caille",
+  guineaFowl: "Pintade",
+  goose: "Oie",
+  poultryLiver: "Foie de volaille",
+  capon: "Chapon",
+  pigeon: "Pigeon",
+  pheasant: "Faisan",
+  // Fish
+  salmon: "Saumon",
+  tuna: "Thon",
+  cod: "Cabillaud",
+  trout: "Truite",
+  sardine: "Sardine",
+  anchovy: "Anchois",
+  whiting: "Merlan",
+  surimi: "Surimi",
+  seaBass: "Bar (loup de mer)",
+  seaBream: "Dorade",
+  sole: "Sole",
+  turbot: "Turbot",
+  hake: "Merlu",
+  pollock: "Colin",
+  saithe: "Lieu noir",
+  haddock: "Églefin",
+  mackerel: "Maquereau",
+  herring: "Hareng",
+  redMullet: "Rouget",
+  skate: "Raie",
+  monkfish: "Lotte",
+  halibut: "Flétan",
+  swordfish: "Espadon",
+  carp: "Carpe",
+  pike: "Brochet",
+  perch: "Perche",
+  tilapia: "Tilapia",
+  pangasius: "Panga",
+  smokedSalmon: "Saumon fumé",
+  driedFish: "Poisson séché",
+  eel: "Anguille",
+  plaice: "Carrelet (ou plie)",
+  saltCod: "Morue",
+  lemonSole: "Limande",
+  scorpionfish: "Rascasse",
+  // Shellfish
+  shrimp: "Crevettes",
+  langoustine: "Langoustines",
+  lobster: "Homard",
+  crab: "Crabe",
+  spinyLobster: "Langouste",
+  mussels: "Moules",
+  oysters: "Huîtres",
+  scallops: "Saint-Jacques",
+  squid: "Calamar",
+  octopus: "Poulpe",
+  clams: "Palourdes",
+  whelks: "Bulots",
+  spiderCrab: "Araignée de mer",
+  periwinkle: "Bigorneau",
+  crayfish: "Écrevisse",
+  greyShrimp: "Crevette grise",
+  cockle: "Coque",
+  snail: "Escargot",
+  cuttlefish: "Seiche",
+  // Starches
+  semolina: "Semoule",
+  couscous: "Couscous",
+  bulgur: "Boulgour",
+  polenta: "Polenta",
+  quinoa: "Quinoa",
+  pasta: "Pâtes",
+  wholeWheatPasta: "Pâtes complètes",
+  rice: "Riz",
+  basmatiRice: "Riz basmati",
+  brownRice: "Riz complet",
+  oats: "Flocons d'avoine",
+  spaghetti: "Spaghetti",
+  penne: "Penne",
+  tagliatelle: "Tagliatelles",
+  lasagnaSheets: "Lasagnes (feuilles)",
+  gnocchi: "Gnocchi",
+  arborioRice: "Riz arborio",
+  riceNoodles: "Nouilles de riz",
+  udonNoodles: "Nouilles udon",
+  sobaNoodles: "Nouilles soba",
+  chineseNoodles: "Nouilles chinoises",
+  riceVermicelli: "Vermicelles de riz",
+  soyVermicelli: "Vermicelles de soja",
+  stickyRice: "Riz gluant",
+  sushiRice: "Riz à sushi",
+  jasmineRice: "Riz jasmin",
+  // Legumes
+  greenLentils: "Lentilles vertes",
+  redLentils: "Lentilles corail",
+  chickpeas: "Pois chiches",
+  whiteBeans: "Haricots blancs",
+  kidneyBeans: "Haricots rouges",
+  blackBeans: "Haricots noirs",
+  splitPeas: "Pois cassés",
+  favaBeans: "Fèves",
+  edamame: "Edamame",
+  pintoBeans: "Haricots pinto",
+  flageoletBeans: "Haricots flageolets",
+  goldenLentils: "Lentilles blondes",
+  // Nuts, seeds and other dry goods
+  peanutsShelled: "Cacahuètes",
+  almonds: "Amandes",
+  walnuts: "Noix",
+  hazelnuts: "Noisettes",
+  cashews: "Noix de cajou",
+  pistachios: "Pistaches",
+  pecans: "Noix de pécan",
+  almondPowder: "Poudre d'amande",
+  pineNuts: "Pignons de pin",
+  sunflowerSeeds: "Graines de tournesol",
+  pumpkinSeeds: "Graines de courge",
+  shreddedCoconut: "Noix de coco râpée",
+  raisins: "Raisins secs",
+  prunes: "Pruneaux",
+  driedApricots: "Abricots secs",
+  sesameSeeds: "Graines de sésame",
+  blackMushrooms: "Champignons noirs",
+  noriSeaweed: "Algue nori",
+  wakameSeaweed: "Algue wakamé",
+  kombuSeaweed: "Algue kombu",
+  bambooShoots: "Pousses de bambou",
+  waterChestnuts: "Châtaignes d'eau",
+  // Breads
+  bread: "Pain",
+  sandwichBread: "Pain de mie",
+  wholeWheatBread: "Pain complet",
+  baguette: "Baguette",
+  ryeBread: "Pain de seigle",
+  breadcrumbs: "Chapelure",
+  burgerBun: "Pain à burger",
+  briocheBun: "Pain brioché",
+  hotDogBun: "Pain à hot-dog",
+  pitaBread: "Pain pita",
+  bagel: "Pain bagel",
+  naan: "Naan",
+  wrapBread: "Pain wrap",
+  vienneseBread: "Pain viennois",
+  countryBread: "Pain de campagne",
+  multigrainBread: "Pain aux céréales",
+  breadRoll: "Petit pain",
+  swedishBread: "Pain suédois",
+  glutenFreeBread: "Pain sans gluten",
+  rusk: "Biscotte",
+  croutons: "Croûtons",
+  focaccia: "Focaccia",
+  ciabatta: "Ciabatta",
+  cornTortilla: "Tortilla de maïs",
+  wheatTortilla: "Tortilla de blé",
+  breadstick: "Gressin",
+  // Raw dough
+  puffPastry: "Pâte feuilletée",
+  shortcrustPastry: "Pâte brisée",
+  pizzaDough: "Pâte à pizza",
+  sweetShortcrustPastry: "Pâte à tarte sablée",
+  // Dairy
+  milk: "Lait",
+  butter: "Beurre",
+  cremeFraiche: "Crème fraîche",
+  liquidCream: "Crème liquide",
+  cheese: "Fromage",
+  emmental: "Emmental",
+  gruyere: "Gruyère",
+  parmesan: "Parmesan",
+  mozzarella: "Mozzarella",
+  goatCheese: "Chèvre (fromage)",
+  feta: "Feta",
+  comte: "Comté",
+  fromageBlanc: "Fromage blanc",
+  mascarpone: "Mascarpone",
+  yogurt: "Yaourt",
+  burrata: "Burrata",
+  ricotta: "Ricotta",
+  pecorino: "Pecorino",
+  gorgonzola: "Gorgonzola",
+  cheddar: "Cheddar",
+  brie: "Brie",
+  camembert: "Camembert",
+  roquefort: "Roquefort",
+  munster: "Munster",
+  reblochon: "Reblochon",
+  cantal: "Cantal",
+  beaufort: "Beaufort",
+  saintNectaire: "Saint-Nectaire",
+  blueCheese: "Bleu (fromage)",
+  cancoillotte: "Cancoillotte",
+  tomme: "Tomme",
+  epoisses: "Époisses",
+  chaource: "Chaource",
+  livarot: "Livarot",
+  pontLeveque: "Pont-l'Évêque",
+  morbier: "Morbier",
+  racletteCheese: "Raclette (fromage)",
+  fourmeDAmbert: "Fourme d'Ambert",
+  salers: "Salers",
+  ossauIraty: "Ossau-Iraty",
+  vacherin: "Vacherin",
+  saintMarcellin: "Saint-Marcellin",
+  neufchatel: "Neufchâtel",
+  crottinDeChavignol: "Crottin de Chavignol",
+  abondanceCheese: "Abondance",
+  carreDeLEst: "Carré de l'Est",
+  edam: "Edam",
+  gouda: "Gouda",
+  mimolette: "Mimolette",
+  maroilles: "Maroilles",
+  montDor: "Mont d'or",
+  kefir: "Kéfir",
+  greekYogurt: "Yaourt à la grecque",
+  // Eggs
+  egg: "Oeuf",
+  eggYolk: "Jaune d'oeuf",
+  eggWhite: "Blanc d'oeuf",
+  // Plant-based alternatives
+  coconutMilk: "Lait de coco",
+  coconutCream: "Crème de coco",
+  almondMilk: "Lait d'amande",
+  oatMilk: "Lait d'avoine",
+  tofu: "Tofu",
+  silkenTofu: "Tofu soyeux",
+  // Spices
+  herbesDeProvence: "Herbes de Provence",
+  blackPepper: "Poivre noir",
+  paprika: "Paprika",
+  espelettePepper: "Piment d'Espelette",
+  cayennePepper: "Piment de Cayenne",
+  cumin: "Cumin",
+  curryPowder: "Curry (poudre)",
+  turmeric: "Curcuma",
+  cinnamon: "Cannelle",
+  nutmeg: "Muscade",
+  saffron: "Safran",
+  clove: "Clou de girofle",
+  vanillaBean: "Vanille (gousse)",
+  whitePepper: "Poivre blanc",
+  pinkPepper: "Poivre rose",
+  sichuanPepper: "Poivre du Sichuan",
+  smokedPaprika: "Paprika fumé",
+  birdEyeChili: "Piment oiseau",
+  juniperBerries: "Baies de genièvre",
+  starAnise: "Anis étoilé (badiane)",
+  greenAnise: "Anis vert",
+  fennelSeeds: "Graines de fenouil",
+  sumac: "Sumac",
+  nigella: "Nigelle",
+  allspice: "Quatre épices",
+  colomboPowder: "Colombo (poudre)",
+  baharat: "Baharat",
+  horseradish: "Raifort",
+  herbSalt: "Sel aux herbes",
+  celerySalt: "Sel de céleri",
+  fleurDeSel: "Fleur de sel",
+  salt: "Sel",
+  fiveSpice: "Cinq épices",
+  garamMasala: "Garam masala",
+  corianderSeeds: "Graines de coriandre",
+  groundCoriander: "Coriandre en poudre",
+  cardamom: "Cardamome",
+  fenugreek: "Fenugrec",
+  jalapeno: "Piment jalapeño",
+  chipotle: "Piment chipotle",
+  poblanoPepper: "Piment poblano",
+  habanero: "Piment habanero",
+  rasElHanout: "Ras el hanout",
+  zaatar: "Za'atar",
+  // Sauces
+  soySauce: "Sauce soja",
+  mustard: "Moutarde",
+  mayonnaise: "Mayonnaise",
+  ketchup: "Ketchup",
+  tabasco: "Tabasco",
+  worcestershireSauce: "Sauce Worcestershire",
+  fishSauce: "Sauce nuoc-mâm",
+  wasabi: "Wasabi",
+  harissa: "Harissa",
+  curryPaste: "Pâte de curry",
+  peanutButter: "Beurre de cacahuète",
+  dijonMustard: "Moutarde de Dijon",
+  wholegrainMustard: "Moutarde à l'ancienne",
+  barbecueSauce: "Sauce barbecue",
+  tartarSauce: "Sauce tartare",
+  cocktailSauce: "Sauce cocktail",
+  bearnaiseSauce: "Sauce béarnaise",
+  hollandaiseSauce: "Sauce hollandaise",
+  bechamelSauce: "Sauce béchamel",
+  teriyakiSauce: "Sauce teriyaki",
+  ponzuSauce: "Sauce ponzu",
+  chimichurri: "Chimichurri",
+  redPesto: "Pesto rouge (tomates séchées)",
+  pesto: "Pesto",
+  oysterSauce: "Sauce huître",
+  hoisinSauce: "Sauce hoisin",
+  sriracha: "Sauce sriracha",
+  sweetChiliSauce: "Sauce sweet chili",
+  miso: "Miso",
+  shrimpPaste: "Pâte de crevettes",
+  redCurryPaste: "Pâte de curry rouge (thaï)",
+  greenCurryPaste: "Pâte de curry vert (thaï)",
+  tahini: "Tahini",
+  aioli: "Aïoli",
+  vinaigrette: "Sauce vinaigrette",
+  hummus: "Houmous",
+  // Seasonings — oils, vinegars, wines and other flavorings
+  oliveOil: "Huile d'olive",
+  sunflowerOil: "Huile de tournesol",
+  rapeseedOil: "Huile de colza",
+  coconutOil: "Huile de coco",
+  sesameOil: "Huile de sésame",
+  ciderVinegar: "Vinaigre de cidre",
+  whiteVinegar: "Vinaigre blanc",
+  balsamicVinegar: "Vinaigre balsamique",
+  capers: "Câpres",
+  olives: "Olives",
+  blackOlives: "Olives noires",
+  greenOlives: "Olives vertes",
+  whiteWine: "Vin blanc (cuisine)",
+  redWine: "Vin rouge (cuisine)",
+  roseWine: "Vin rosé (cuisine)",
+  redWineVinegar: "Vinaigre de vin rouge",
+  whiteWineVinegar: "Vinaigre de vin blanc",
+  sherryVinegar: "Vinaigre de xérès",
+  walnutOil: "Huile de noix",
+  hazelnutOil: "Huile de noisette",
+  peanutOil: "Huile d'arachide",
+  chiliOil: "Huile pimentée",
+  riceVinegar: "Vinaigre de riz",
+  cornOil: "Huile de maïs",
+  grapeseedOil: "Huile de pépins de raisin",
+  soybeanOil: "Huile de soja",
+  palmOil: "Huile de palme",
+  mirin: "Mirin",
+  sake: "Saké (cuisine)",
+  lemonJuice: "Jus de citron",
+  limeJuice: "Jus de citron vert",
+  orangeJuice: "Jus d'orange",
+  appleJuice: "Jus de pomme",
+  grapeJuice: "Jus de raisin",
+  tomatoJuice: "Jus de tomate",
+  cranberryJuice: "Jus de cranberry",
+  coffee: "Café",
+  tea: "Thé",
+  beer: "Bière (cuisine)",
+  cider: "Cidre (cuisine)",
+  champagne: "Champagne / vin pétillant (cuisine)",
+  portWine: "Porto (cuisine)",
+  vinJaune: "Vin jaune (cuisine)",
+  cognac: "Cognac",
+  rum: "Rhum",
+  whisky: "Whisky",
+  vodka: "Vodka",
+  // Bases — flours, stocks and other cooking essentials
+  wheatFlour: "Farine de blé",
+  wholeWheatFlour: "Farine complète",
+  cornFlour: "Farine de maïs",
+  buckwheatFlour: "Farine de sarrasin",
+  riceFlour: "Farine de riz",
+  vegetableStockCube: "Bouillon cube légumes",
+  chickenStockCube: "Bouillon cube volaille",
+  tomatoPaste: "Concentré de tomate",
+  tomatoCoulis: "Coulis de tomate",
+  cannedPeeledTomatoes: "Tomates pelées (conserve)",
+  sunDriedTomatoes: "Tomates séchées",
+  vealStock: "Fond de veau",
+  chickenStock: "Fond de volaille",
+  beefStockCube: "Bouillon cube bœuf",
+  fishStockCube: "Bouillon cube poisson",
+  vegetableBroth: "Bouillon de légumes",
+  chickenBroth: "Bouillon de volaille",
+  beefBroth: "Bouillon de bœuf",
+  courtBouillon: "Court-bouillon",
+  dashi: "Dashi (bouillon japonais)",
+  shellfishBisque: "Bisque de crustacés",
+  tapiocaFlour: "Farine de tapioca",
+  masaHarina: "Masa harina",
+  water: "Eau",
+  sparklingWater: "Eau gazeuse",
+  orangeBlossomWater: "Eau de fleur d'oranger",
+  roseWater: "Eau de rose",
+  fishFumet: "Fumet de poisson",
+  // Thickeners and raising agents
+  bakersYeast: "Levure boulangère",
+  bakingPowder: "Levure chimique",
+  cornstarch: "Maïzena",
+  lupinFlour: "Farine de lupin",
+  gelatin: "Gélatine",
+  bakingSoda: "Bicarbonate de soude",
+  potatoStarch: "Fécule de pomme de terre",
+  // Sugars
+  sugar: "Sucre",
+  honey: "Miel",
+  mapleSyrup: "Sirop d'érable",
+  brownSugar: "Sucre roux",
+  powderedSugar: "Sucre glace",
+  demeraraSugar: "Cassonade",
+  darkChocolate: "Chocolat noir",
+  milkChocolate: "Chocolat au lait",
+  whiteChocolate: "Chocolat blanc",
+  chocolateChips: "Pépites de chocolat",
+  cocoaPowder: "Cacao en poudre",
+  vanillaExtract: "Extrait de vanille",
+  palmSugar: "Sucre de palme",
+  caneSyrup: "Sirop de sucre de canne",
+};
+
+/**
+ * Extra French matching phrases for a handful of {@link INGREDIENT_LABELS_FR}
+ * entries whose primary (display) label doesn't match how the phrase is
+ * actually written in running recipe text — see that constant's own doc
+ * comment for why this is expected to grow over time, the same "exceptions
+ * only, not every entry" shape as {@link INGREDIENT_LABEL_SYNONYMS_EN}.
+ */
+export const INGREDIENT_LABEL_SYNONYMS_FR: Record<string, string[]> = {
+  // "Vanille (gousse)" is display-first-word-last; real recipe text says
+  // "gousse de vanille" (pod word first) — see INGREDIENT_LABELS_FR's doc
+  // comment.
+  vanillaBean: ["Gousse de vanille"],
+};
+
+/**
+ * French matching synonyms for the `Unit` reference catalog
+ * (`apps/api/src/db/reference-seed-data.ts`'s `UNITS`), keyed by
+ * `Unit.key` — the French counterpart to {@link UNIT_LABELS_EN}. Unlike
+ * {@link INGREDIENT_LABELS_FR}, these are **not** copied from
+ * `apps/web`'s locale file: that file has exactly one display label per
+ * unit (`apps/web/src/locales/fr/translation.json`'s `catalog.units`,
+ * e.g. `tablespoon`: "cuillère à soupe"), fine for a dropdown but not
+ * enough to *match* French recipe text against — real recipes freely mix
+ * the full phrase, its plural, and common abbreviations ("cuillère à
+ * soupe", "cuillères à soupe", "c. à soupe", "càs" all appear in the
+ * wild), so each entry here is hand-authored the same way
+ * {@link UNIT_LABELS_EN} was, starting from that same display label.
+ *
+ * Several of these are genuinely multi-word ("cuillère à soupe") — unlike
+ * English units, which are always a single word/abbreviation. Matching a
+ * multi-word unit needs the same ordered-contiguous-run search
+ * `matchIngredientName` already does for ingredients, not the older
+ * single-first-word check `matchUnit` used before French support existed
+ * — see `matchUnit`'s own doc comment (`ingredient-matcher.ts`) for the
+ * bug that would otherwise cause: a multi-word French synonym's *whole
+ * phrase* (spaces and all) would never equal a single extracted word, so
+ * it could never match anything at all.
+ */
+export const UNIT_LABELS_FR: Record<string, string[]> = {
+  gram: ["g", "gr", "gramme", "grammes"],
+  kilogram: ["kg", "kilo", "kilos", "kilogramme", "kilogrammes"],
+  milliliter: ["ml", "millilitre", "millilitres"],
+  centiliter: ["cl", "centilitre", "centilitres"],
+  liter: ["l", "litre", "litres"],
+  tablespoon: ["cuillère à soupe", "cuillères à soupe", "c. à soupe", "c à soupe", "cas", "càs"],
+  teaspoon: ["cuillère à café", "cuillères à café", "c. à café", "c à café", "cac", "càc"],
+  piece: ["unité", "unités", "pièce", "pièces"],
+  pinch: ["pincée", "pincées"],
+  slice: ["tranche", "tranches"],
+  clove: ["gousse", "gousses"],
+  bunch: ["botte", "bottes"],
+  sachet: ["sachet", "sachets"],
+  sprig: ["brin", "brins"],
+  cup: ["tasse", "tasses"],
+  ounce: ["once", "onces"],
+  pound: ["livre", "livres"],
+};

packages/shared/src/index.ts

@@ -4,6 +4,7 @@
 // detail specific to one side.
 
 export * from "./data/catalog-labels-en.js";
+export * from "./data/catalog-labels-fr.js";
 export * from "./errors/error-codes.js";
 export * from "./schemas/account.js";
 export * from "./schemas/auth.js";