Launch inevery language.

Wrap your JSX in <T>, run one command, and ship every string in 100+ languages.

Get started Read the docs

public/_gt/[locale].json — one string, five locales · widths measured at render, not typed

enDeploy now

frDéployer maintenant

deJetzt bereitstellen

ja今すぐデプロイ

zh立即部署

Trusted by the world’s best companies

CursorRampMintlifyProfoundPartifulClickHouse

One toolchain, every stack.

Developer-first SDKs to translate everything from simple sites to complex user experiences.

app/page.tsx

1import { T, Num, DateTime } from 'gt-next';
2 
3export default function Home() {
4  return (
5    <T>
6      <main>
7        <h1>Hello, world!</h1>
8        <p>
9          <DateTime>{new Date()}</DateTime>
10        </p>
11        <p>
12          GT has everything you need to ship your
13          product in <Num>{118}</Num> languages.
14        </p>
15      </main>
16    </T>
17  );
18}

gt-next

Server components, middleware locale routing, and static translations built at build time.

npm i gt-nextnpx gt@latest

UI<T>…</T>

Text🇪🇸es'¡Hola, mundo!'

Numbers🇩🇪de1.234.567,89

Currencies🇩🇪de1.280,00 €

Dates🇫🇷fr29 juil. 2026

Plurals🇵🇱pl1 plik · 4 pliki

FunctionsuseGT() · getGT()

Contextcontext="file"

Routing🇫🇷fr/fr/a-propos

gt-next reference

Everything localization needs.

What translation does to a layout, the libraries you write against, the platform that holds your context, and the edge that serves the result — one system.

Every locale is a different length

One button in four languages, measured by the browser rather than estimated. German runs long, Japanese runs short, and Arabic re-anchors the whole line.

enEnglish

Save changes

source

deDeutsch

Änderungen speichern

+63%vs en

ja日本語

変更を保存

−25%vs en

arالعربية

حفظ التغييرات

−25%vs en

widths measured at render — measureText, not typed

Ranked against English

A layout that only fits the source string breaks somewhere near the top of this list.

deGerman+35%

esSpanish+22%

frFrench+20%

ruRussian+18%

enEnglishbaseline

koKorean−12%

jaJapanese−38%

zhChinese−45%

Code

Developer-first libraries for React, Next.js, and more, battle-tested in production apps with millions of users.

<T> wraps any JSX — nested elements and all
useGT() returns strings for anything that is not JSX
<Num> and <DateTime> format to the reader’s locale

Read the docs

@generaltranslation — first-party SDKsnpm

gt-nextNext.js — App & Pages Router

import { T, useGT } from 'gt-next'

gt-reactReact 18+ — SPA or SSR

import { T, useGT } from 'gt-react'

gt-react-nativeiOS · Android

import { T, useLocale } from 'gt-react-native'

gt-nodeNode — Express, Hono, workers

import { gt } from 'gt-node'

Context

One word, two meanings. A context tag decides which translation ships.

enSave

context=“file”

speichern

dewrite it to disk

context=“discount”

sparen

despend less money

Terminology

One term, six locales, decided once. Per-locale style rules keep the wording identical everywhere it appears.

enSettings

esConfiguración
ja設定
deEinstellungen
ruНастройки
ko설정
frParamètres

Routing

Automatic detection and locale-based routing, on SEO-friendly paths you never configure.

example.com/abouten

example.com/es/aboutes

example.com/fr/a-proposfr

example.com/ja/aboutja

example.com/de/aboutde

example.com/zh/aboutzh

URL locale → cookie → Accept-Language → default

Translation

AI agents that understand your project structure and localize your content in context.

app/page.tsx

1import { T } from 'gt-next';
2 
3export default function Home() {
4  return (
5    <T>
6      <h1>Hello, world!</h1>
7      <p>Get started</p>
8      <p>Payment received</p>
9    </T>
10  );
11}

public/_gt/es.jsones

Hello, world!"¡Hola, mundo!"

Get started"Comenzar ahora"

Payment received"Pago recibido"

public/_gt/ja.jsonja

Hello, world!"こんにちは世界！"

Get started"始める"

Payment received"支払いを受領しました"

public/_gt/de.jsonde

Hello, world!"Hallo, Welt!"

Get started"Jetzt starten"

Payment received"Zahlung erhalten"

One config file

Locales in, output path out. The CLI and every SDK read the same file.

gt.config.json

{
  "defaultLocale": "en",
  "locales": ["es", "fr", "ja", "de", "zh"],
  "files": {
    "gt": {
      "output": "public/_gt/[locale].json"
    },
    "json": {
      "include": ["content/[locale]/*.json"]
    }
  }
}

$ npx gt translate

Scanning src — 128 strings found

Wrote public/_gt/es.json

Wrote public/_gt/fr.json

Wrote public/_gt/ja.json

Wrote public/_gt/de.json

Wrote public/_gt/zh.json

Done in 12.4s — 640 translations

Built for your next billion users

118

locales, ready today

first-party SDKs

<1s

over-the-air updates

to start

Every writing system

Latin, Cyrillic, Greek, Arabic, Devanagari, Han, Hangul, Thai — joined, stacked and bidi-resolved by the browser, with per-script fallbacks in the SDK.

languageenLatin

语言zhHan

भाषाhiDevanagari

языкruCyrillic

لغةarArabic

γλώσσαelGreek

언어koHangul

ภาษาthThai

5 points of presence shown · anycast · versioned per locale

Delivery

A global, low-latency translation CDN. Push over-the-air updates without redeploying your app.

Fix a translation and ship it without touching your build
Served from the edge, close to whoever asked for it
Versioned per locale, so a rollback is one step

Counting is not concatenation

English has two plural forms, Polish four, Japanese one. GT ships ICU plurals, so the number picks the form instead of the string.

count12522

en2 forms

1 file2 files5 files22 files

onefile

otherfiles

pl4 forms

1 plik2 pliki5 plików22 pliki

oneplik

fewpliki

manyplików

otherpliku

ja1 form

1個のファイル2個のファイル5個のファイル22個のファイル

other個のファイル

Both directions, one markup

Set dir and the browser mirrors rows, alignment and controls. Nothing about the panel is written twice.

dir="ltr"

Settings

Notifications

Save

dir="rtl"

الإعدادات

الإشعارات

حفظ

Previews

Preview translations in development before they go live.

localhost:3000es · dev

en · main

Launch your product

Get started

es · preview

Lanza tu producto

Comenzar ahora

previewnot in main

Live Translation

Translate user-generated content on demand, in full context.

POST /translate

“Great seats, worth every peso.”

pt-BR

“Ótimos lugares, valeu cada peso.”

38 ms · cached at the edge

Customization

Bring your own detection function, components and formats.

gt.config.ts

getLocale: (req) => {

return req.cookies.gt

?? req.headers.lang

?? 'en';

}

Glossaries

Pin a term, set per-locale style rules. Both hold on every later run.

Vaultpinned

deVault
es~~Bóveda~~Vault
ja金庫Vault

deUse formal “Sie”
allActive voice, avoid jargon

And the parts nobody demos

Everything above assumes the unglamorous things already work. They do.

SEO-friendly locale paths, with no configuration
ICU plurals, numbers, currencies, and dates
Dev previews before anything reaches production
Over-the-air updates without a redeploy
Glossaries and per-locale style rules
SOC 2 Type II, GDPR, ISO 27001

Every locale on one screen.

Agents write the translations. You open one grid — the source beside every target locale — and touch only what needs a human.

page.tsx⌘K

esjadefrzh

HistoryDownload

Sourceesjade

Get started by editing the page.tsx file.

app/page.tsx:5

Para comenzar, edita el archivo page.tsx.

Approved

開始するには、page.tsxファイルを編集してください。

Approved

Um zu beginnen, bearbeiten Sie die Datei page.tsx.

Approved

Generated by create-next-app

app/page.tsx:9

Generado con Create Next App

Approved

create-next-app によって生成されました

Needs review

Erstellt mit Create Next App

Approved

Deploy now

app/page.tsx:14

Deploy Now

Needs review

今すぐデプロイ

Approved

Jetzt bereitstellenesc to cancel

Documentation

app/page.tsx:18

Documentation

Approved

ドキュメント

Approved

Dokumentation

Approved

Looking for a starting point or more instructions? Head to Templates or the Learning center.

app/page.tsx:6

¿Buscas un punto de partida o más instrucciones? Dirígete a Templates o al centro de Learning.

Approved

開始点や詳細な手順をお探しですか？テンプレートまたはラーニングセンターをご覧ください。

Needs review

Suchen Sie nach einem Ausgangspunkt oder weiteren Anweisungen? Gehen Sie zu Templates oder zum Learning Center.

Approved

Search by file name, component name, key, source text or translated text — ⌘KAnnotations are not on the Starter plan

Agents write. You approve.

Review state is scoped per entry and per locale — approve the Spanish translation while the Japanese one is still in review.

workspace · es-4194 strings

source — en

translation — es

Hello, world!

¡Hola, mundo!approved

Launch in every language

Lanza en todos los idiomasapproved

End-to-end localization for the world's best companies

Localización de extremo a extremo para las mejores empresas del mundo.Localización integral para las mejores empresas del mundo.edit

By continuing you agree to our Terms of Service.

Al continuar, aceptas nuestros Términos de Servicio.approved

⌘K searchhistorydownloadagent · locadex

Review, without living in a CAT tool

You review exceptions, not everything — the same content is simultaneously in your repo.

Every entry shows its source and all five targets at once
Regenerated translations arrive as diffs, never as surprises
Change a live string and the CDN serves it — no redeploy
Labels, notes and threaded comments, scoped per locale

$ npx gt translate — 1 entry regeneratedja

 @@ public/_gt/ja.json @@
 "0d5c1f2a": "ドキュメント",
-"a41f0c92": "create-next-app によって生成されました",
+"a41f0c92": "create-next-app により生成されました",
 "3b9e51b7": "今すぐデプロイ",
 "8f2ab41c": "開始するには、page.tsxファイルを編集してください。",
 "6c2d84e0": "テンプレートまたはラーニングセンターをご覧ください。"

Generated by create-next-app

create-next-app によって生成されました

Needs reviewLegal

NoteHold until the JP terms page ships.

youIs 生成されました the right register for the footer?

locadex · agentMatched the app’s existing UI strings — flagged for review.

v2.1.0Added checkout page translations3f2c41a

v2.0.0Initial translations9b81d02

$ npx gt translate --tag v2.1.0 -m “Added checkout page translations”

One dashboard holds the context.

Curate glossaries, style rules, and project context — with editing, versioning, and integrations under one project, one config, and one bill.

acme/web6 locales · 128 strings

LocaleTranslatedState

enEnglish128 keyssource

esEspañol128 / 128live · v214

frFrançais128 / 128live · v214

ja日本語126 / 1282 in review

deDeutsch128 / 128live · v214

zh中文128 / 128live · v214

GitHubPR #218 merged · +38 −6CDNv214 · fra · 12 msLocadexlast run 41 min ago

The context platform

Everything the agents read before they write: your glossary, your locale rules, your project files — versioned, assignable, and shared across projects.

Glossaries and per-locale style rules
Every source version restorable, tagged from the CLI
GitHub, Google Drive, Mintlify, Sanity and Storyblok
Over-the-air updates without a redeploy

gt.config.jsonchecked into acme/web

{
  "defaultLocale": "en",
  "locales": ["es", "fr", "ja", "de", "zh"],
  "files": {
    "gt": { "output": "public/_gt/[locale].json" }
  }
}

See how context works

Say it once, and every translation obeys.

A glossary and a set of directives, defined once at the organization level and assigned to every project.

Glossary

Locadexdo not translate

Context Groupdo not translate

General Translationdo not translate

WorkflowFlujo de trabajo (es) · ワークフロー (ja)

GlossaryGlosario (es) · 用語集 (ja)

ReviewRevisión (es) · レビュー (ja)

Directives

Use formal “Sie” (de)

Active voice, avoid jargon

Never translate product names

Keep {variables} and code verbatim

Local date formats — 29 juil. 2026 (fr)

Um zu beginnen, bearbeite deine page.tsx-Datei mit dem Ortsindex.

Without the group

Um zu beginnen, bearbeiten Sie directive Ihre page.tsx-Datei mit Locadexglossary.

With the group

Apply — 1 entry rewrittende

 @@ public/_gt/de.json @@
 "5c19e2b4": "Dokumentation",
-"9d47a3f1": "Um zu beginnen, bearbeite deine page.tsx-Datei mit dem Ortsindex.",
+"9d47a3f1": "Um zu beginnen, bearbeiten Sie Ihre page.tsx-Datei mit Locadex.",
 "2e8b90cd": "Jetzt bereitstellen",
 "b31c7a55": "Erstellt mit Create Next App"

Context applies to new translations. Existing ones change when you press Apply.Groups can be autogenerated from your project files.

Every once in awhile, I see a snippet of code that makes me a bit emotional. Now is one of those moments. Internationalization went from “$%!# this” to “trivial”.

TheoCEO, T3Chat

“insane engineering prowess” — Guillermo Rauch, CEO, Vercel

Everything you need, in one toolchain.

Buildtime, runtime, and review — one project, one config, one bill.

One string, source to screen

Hover a stage — the same string climbs all seven.

gt cliacme/web

$ npx gt translate

gt-next detected · Next.js App Router

128 strings · 3 new · 2 changed

✓ es fr ja de zh

done in 8.4s · local edits preserved

Code

Mark up JSX once — every locale ships from your build.

page.tsx

import { T } from 'gt-next'
 
<T>
  <h1>Hello, world!</h1>
</T>

es¡Hola, mundo!

jaこんにちは世界！

Content

User-generated content, translated on demand at runtime.

notify.tsruntime

await tx('Payment received', {
  $locale: 'ja',
})

200 · 84 ms · cached at the edge

{ "ja": "支払いを受領しました" }

Dashboard

Glossaries, directives, and review in one workspace.

acme/webproduction

enesfrjadezh

glossary24 terms

directives6 rules

reviewqueue empty

v214 · published2 min ago

Locadex

The agent that internationalizes your repo in guarded PRs.

PR #218locadex → main

@@ −4,1 +4,1 @@ app/checkout.tsx

−<p>Payment received</p>

+<p><T>Payment received</T></p>

merged+38 −6 · checks passed

Context, defined once — inherited all the way down

Glossary and tone set at the top; every project and component below inherits them.

Organization

Glossary

“Locadex is the GT agent — do not translate.”

Directives

“Active voice. Use formal ‘Sie.’” de

Project

1brand-coreorg

2docs-styleorg

3checkout-copyproject

On overlap the top group wins: formal ‘Sie’ holds, ~~casual tone~~ loses.

Component

<T $context="popup, not bread">
  Click the toast to dismiss
</T>

esla notificación~~la tostada~~

One commit, on the clock

09:41:02committedapp/page.tsx

09:41:18extractedhash 0f3a92

09:41:44pr openedlocadex · #218

09:42:03translated6 locales · 3.4 s

09:44:37approvedreview · @mira

09:45:01publishededge · 3 regions

09:45:09renderedde · 38 ms

Get started Talk to an engineer

Pricing for everyone.

Full-stack localization across buildtime, runtime, and review.

Starter

$0to start

Start free and upgrade when you ship. Everything you need to localize a real product.

Every SDK and the translation CLI
Dashboard, glossaries, and the editor
Locadex agent runs on your repo

Get started

Enterprise

Customannual

Talk to an engineer about implementation, volume, and your security review.

Volume pricing across projects
SOC 2 Type II, GDPR, ISO 27001
Support from the engineers who build it

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