i18n-localization
App Internationalization and Localization
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 (September 2026): react-i18next 17.0.13, vue-i18n 11.4.10, next-intl 4.14.2,
i18next 26.4.2. Missing-key persistence snapshots: i18next-http-middleware 3.9.8 and
i18next-fs-backend 2.6.7 (latest status unverified on 2026-09-10; check the package registry
before pinning). Require at least the following verified security fixes: critical missing-key prototype-pollution
fixes first shipped in middleware 3.9.7 (CVE-2026-48714, affected <3.9.7)
and filesystem backend 2.6.6 (CVE-2026-48713, affected <2.6.6).
Do not expose missing-key persistence to untrusted users; disable saveMissing where unnecessary.
Advisory ranges checked 2026-09-10.