sync-translations

Synchronize all translation files in messages/ so every language contains the same keys with correct, natural translations.

Project i18n Setup

• Library: next-intl
• Source of truth for structure: messages/de.json (German, default locale)
• All locales: defined in src/i18n/config.ts → currently ['de', 'en']
• Message files: messages/<locale>.json — one per locale, flat namespace objects
• Usage in code: useTranslations('<namespace>') / getTranslations('<namespace>'), then t('key')

Your Task

When invoked, work through the following steps in order.

Step 1 — Read everything relevant

1. Read src/i18n/config.ts to get the current list of locales.
2. Read every file in messages/ (one per locale).
3. Scan the entire src/ directory for translation key usage:
   • Find all useTranslations('namespace') and getTranslations('namespace') calls
   • Find all t('key'), t('namespace.key'), and t('key', {...}) call patterns
   • Focus on .tsx, .ts files under src/

Step 2 — Identify what needs to change

Check for four types of issues:

A) Missing keys

A key exists in one language file but not in another.

• Reference language: de.json (German is the source of truth for structure)
• List every key path (e.g. dashboard.noTransactions) that is present in de.json but absent from another locale.
• Also check the reverse: keys in non-German files that don't exist in de.json are orphaned and should be noted but NOT automatically deleted — report them for manual review.

B) Keys used in code but missing from ALL message files

A t('key') call references a key that doesn't exist in any messages/ file.

• These are newly added UI strings that haven't been translated yet.
• They need to be added to every locale.

C) Structural drift

The JSON structure (nesting, namespace names) differs between files.

• Example: de.json has { "expenses": { "title": "..." } } but en.json has "expensesTitle": "..." at the top level.
• Flag these — do not silently restructure without reporting.

D) Explicitly changed wording (only when invoked after a specific change)

If the user describes a text change (e.g. "I updated the label for X"), identify the affected key and update all other locales to match the new meaning.

Step 3 — Plan before editing

Write out a concise change plan before touching any file. Group by locale and type:

de.json  — no changes needed (reference)
en.json  — ADD 3 keys:
             expenses.filterByCategory  (missing)
             analytics.forecastTitle    (missing)
             settings.resetConfirm      (missing)
         — NOTE: orphaned key 'dashboard.chartPlaceholder' exists only in en.json

If no changes are needed, state that clearly and stop.

Step 4 — Edit the message files

Apply every planned addition or correction.

Translation quality rules:

• Translations must be natural, idiomatic, and context-aware — not word-for-word.
• German (de): formal enough for a finance app, but approachable. Use "du" forms unless the existing file uses "Sie". Check the existing tone before adding new strings.
• English (en): concise, professional. Match the register of existing English strings.
• For financial/accounting terms use the standard terminology of the target language (e.g. "Girokonto" not "Gehaltskonto", "Savings Account" not "Saving Account").
• Preserve all interpolation placeholders exactly: {count}, {name}, {amount} must appear unchanged in every locale.
• Preserve ICU message syntax for plurals and selects if used.
• Keep key order inside each namespace consistent with de.json — new keys go at the bottom of their namespace.

File format rules:

• Valid JSON only — no trailing commas, no comments.
• Same indentation as the existing file (2 spaces).
• Do not reformat or reorder existing keys — only add or correct.

Step 5 — Check for new locales

After syncing, re-read src/i18n/config.ts. If a new locale was added that has no file in messages/ yet, create the full messages/<locale>.json by translating every key from de.json. Apply the same translation quality rules.

Step 6 — Verify

After all edits, confirm:

• Every key present in de.json exists in all other locale files
• No interpolation placeholder ({...}) is missing or renamed in any translation
• All files are valid JSON (balanced braces, no trailing commas)
• No key used in src/ code is missing from any messages/ file
• No existing key was accidentally deleted or reordered

Report the checklist result. List any orphaned keys (present in non-German files but not in de.json) separately as items for manual review — do not delete them automatically.