# facebook/fbt

A JavaScript Internationalization Framework

Repository: https://github.com/facebook/fbt
Canonical: https://ross.abutalabs.com/products/fbt
Homepage: https://facebook.github.io/fbt
Language: JavaScript
License: MIT
License Family: permissive
Topics: javascript, internationalization, i18n, framework
Archived: true
Last push: 2024-11-14T00:04:17+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 2954, "days_push": 658, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3881, forks 177 (observed 2026-08-28T04:08:28.111201+00:00)

## What it is
FBT is a JavaScript internationalization framework from Facebook for composing grammatically correct translatable UI text. It uses Babel plugins to extract strings at build time and look up translation payloads at runtime.

## Use cases
- internationalize a React web app
- translate UI strings into multiple languages
- handle grammatical variations in translated text
- collect translatable source strings automatically
- localize a React Native application

## When to choose
- you need powerful i18n with grammatical variation support in JavaScript/React apps
- you want build-time string extraction via Babel
- you need a battle-tested framework used at scale by Facebook

## When to avoid
- you need i18n outside the JavaScript/Node ecosystem
- you want a simple key-value translation setup without Babel tooling
- your project does not use a build pipeline like Babel/Webpack

## Facets
- artifact type: framework
- maturity: active
- function: internationalization, frontend-framework, templating
- domain: web-development, frontend
- platform: browser, cross-platform
- tags: i18n, translation, babel-plugin, react, l10n, localization, nodejs, javascript

## Member repositories
- facebook/fbt (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:28.111201+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:25:42.749274+00:00, confidence not recorded.
  - readme: https://github.com/facebook/fbt (fetched 2026-08-28T04:08:28.111201+00:00, sha 9d289a3ce6e9)
  - homepage: https://facebook.github.io/fbt (fetched 2026-08-29T09:20:01.407464+00:00, sha 6954e333767b)
  - registry_npm: https://registry.npmjs.org/fbt (fetched 2026-08-29T09:20:01.416462+00:00, sha 9abfcbcf25ed)
- Data as of 2026-08-30T08:39:29.467469+00:00.