vue-i18n Internationalization Patterns

Quick Guide: createI18n({ legacy: false }) selects Composition API mode, and useI18n() returns t for messages, d for dates, n for numbers and locale as a writable ref. Plurals are pipe-separated rather than ICU. <i18n-t>, <i18n-d> and <i18n-n> put components and styling inside a formatted result. Version boundary: Legacy API mode, the v-t directive and the Rails %{var} format are deprecated in v11 and removed in v12; $tc() is already gone.

Detailed Resources:

• examples/core.md — setup, useI18n, interpolation, linked messages, plurals, <i18n-t>/<i18n-d>, types, locale switching
• examples/formatting.md — datetime and number format configuration, <i18n-d>/<i18n-n> scoped slots, dynamic currency
• examples/lazy-loading.md — dynamic imports, loading before render, feature splitting, retry and fallback, SSR-safe detection
• reference.md — decision trees, anti-pattern code, checklists, plural-rule tables, v8→v9 migration and v11/v12 removals

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