Localize: App Internationalization Workflow

Systematic approach to internationalizing applications. Covers two scenarios: adding multilingual support from scratch and auditing existing i18n for gaps.

Built from real production pain - the hardest part of i18n is not translation but finding every string that needs it, and making sure translations read naturally in context rather than as mechanical word-by-word output.

Target versions (July 2026): react-i18next 17.0.10, vue-i18n 11.4.7, next-intl 4.13.3, i18next 26.3.6. For missing-key persistence, require i18next-http-middleware 3.9.7+ and i18next-fs-backend 2.6.6+ to fix critical prototype pollution (CVE-2026-48714).

When to use