tesserakit-i18n

Check translation-key coverage across locale files.

tessera-i18n reads JSON locale files, flattens their (possibly nested) keys, picks a reference locale, and reports which keys are missing, extra, or empty in each locale. No network, no execution.

Check

tessera i18n check --input locales/ --output ./out/i18n_pack

Locale files are JSON; the locale name is taken from the filename (en.json → en, messages.fr.json → fr). Nested keys are flattened with dot notation (menu.file.open). Common non-locale files (package.json, tsconfig.json, ...) are skipped.

The reference locale is en if present, otherwise the locale with the most keys.

Artifacts written:

locales.jsonl            one LocaleFile per locale (coverage, missing/extra/empty)
index.md                 coverage table
validation_report.md     per-locale findings
coverage_report.md       fully-translated count + average coverage
missing_keys.md          the actual missing keys per locale (actionable)

Findings

• missing_translations — keys in the reference absent from a locale
• extra_keys — keys in a locale not in the reference (likely stale)
• empty_values — keys present but with an empty string
• low_coverage — a locale below 90% of the reference keys
• parse_error, no_locales, single_locale