i18n Audit

pnpm audit:i18n (script: scripts/i18n-audit.mjs) checks every translation file for locale parity: each file with ≥2 locale codes as top-level keys gets flattened per locale, and any key present in one locale but missing in another is reported, along with empty-string values (usually untranslated copy-paste).

What it catches

• Missing keys: a German user sees a raw key or English fallback (e.g. the entire feeds.tabs / postComments / postStats blocks once absent from es/fr/de).
• Shape drift: preview_modal.title existing only in fr, or {title, description} vs {tools} objects in the same file across locales.
• Empty strings: csvImport.step2.actions was "" in all four locales — the table header rendered blank everywhere.

Fix policy

• Key used somewhere → translate it into the missing locales.
• Key used nowhere (verified with rg for the literal path, which also catches dynamic t(\a.${x}`)` construction) → delete it from the locales that have it. Never invent English copy for a dead key.
• Arrays expand to indexed paths, so list-length drift between locales shows up as missing indices.

Usage

pnpm audit:i18n                    # whole repo, exit 1 on gaps
node scripts/i18n-audit.mjs --json # machine-readable
node scripts/i18n-audit.mjs --files packages/site/app/pages/app/posts/feeds/feeds.json