Localization Workflow

Localization workflow

English is the source and fallback; nine more catalogs ship with the app. Every interface change — labels, tooltips, accessible names, empty/error/confirmation states, backend messages shown in the UI, installer screens — must be checked in all ten languages before it is complete.

1. Use tr("English text", [params]) (or Text/Label, localizeLabels) — never translate campaign content, enum values or IDs.
2. Add the English source and the nine translations to src/i18n/catalogs/*.json. New IDs are m_ + the first 12 hex digits of the SHA-256 of the English source. Keep {0}-style parameters identical. German uses the informal du.
3. Run pnpm i18n:check. It must exit 0: no unregistered UI sources, no missing translations, no parameter mismatches, all installer languages present.
4. Look at the changed views in English, Italian and any affected locale; check long labels and Arabic right-to-left.

Copying English into another catalog to pass the check is not allowed. Details: docs/I18N.md.