I18N Translate

Frontend i18n Translation Workflow

Overview

• Locale files: web/default/src/i18n/locales/{en,zh,fr,ja,ru,vi}.json
• Format: flat JSON under "translation" key, keys are English source strings
• Base locale: en.json (most keys), fallback: zh (Chinese)
• Sync script: bun run i18n:sync (from web/default/)
• All t() calls must have corresponding keys in every locale file

Workflow

Step 1: Run sync and read report

cd web/default && bun run i18n:sync

Read web/default/src/i18n/locales/_reports/_sync-report.json to see per-locale status (missingCount, extrasCount, untranslatedCount).

Step 2: Find missing keys (used in code but not in locale files)

Create and run web/default/scripts/find-missing-keys.mjs:

import fs from 'node:fs/promises'
import path from 'node:path'

const LOCALES_DIR = path.resolve('src/i18n/locales')
const SRC_DIR = path.resolve('src')

const en = JSON.parse(await fs.readFile(path.join(LOCALES_DIR, 'en.json'), 'utf8'))
const enKeys = new Set(Object.keys(en.translation))

const tCallRegex = /\bt\(\s*['"`]([^'"`\n]+?)['"`]\s*[,)]/g
const tCallMultilineRegex = /\bt\(\s*['"`]([^'"`]+?)['"`]\s*\)/g

async function walkDir(dir) {
  const files = []
  const entries = await fs.readdir(dir, { withFileTypes: true })
  for (const entry of entries) {
    const fullPath = path.join(dir, entry.name)
    if (entry.isDirectory()) {
      if (['node_modules', '.git', 'locales', '_reports', '_extras'].includes(entry.name)) continue
      files.push(...(await walkDir(fullPath)))
    } else if (/\.(tsx?|jsx?)$/.test(entry.name)) {
      files.push(fullPath)
    }
  }
  return files
}

const files = await walkDir(SRC_DIR)
const missingKeys = new Map()

for (const file of files) {
  const content = await fs.readFile(file, 'utf8')
  const relPath = path.relative(SRC_DIR, file)
  for (const regex of [tCallRegex, tCallMultilineRegex]) {
    regex.lastIndex = 0
    let match
    while ((match = regex.exec(content)) !== null) {
      const key = match[1]
      if (key.startsWith('{{') || key.includes('${')) continue
      if (!enKeys.has(key)) {
        if (!missingKeys.has(key)) missingKeys.set(key, [])
        missingKeys.get(key).push(relPath)
      }
    }
  }
}

if (missingKeys.size === 0) {
  console.log('All t() keys found in en.json!')
} else {
  console.log(`Found ${missingKeys.size} missing keys:\n`)
  for (const [key, files] of [...missingKeys.entries()].sort(([a], [b]) => a.localeCompare(b))) {
    console.log(`  "${key}"`)
    for (const f of [...new Set(files)]) console.log(`    -> ${f}`)
  }
}

Step 3: Find untranslated entries (value equals English)

Create and run web/default/scripts/find-untranslated.mjs:

import fs from 'node:fs/promises'
import path from 'node:path'

const LOCALES_DIR = path.resolve('src/i18n/locales')
const en = JSON.parse(await fs.readFile(path.join(LOCALES_DIR, 'en.json'), 'utf8'))
const enTrans = en.translation

// Brand names, URLs, technical terms — skip these
const skipPatterns = [
  /^https?:\/\//, /^smtp\./, /^socks5:/, /^name@/, /^noreply@/,
  /^org-/, /^price_/, /^whsec_/, /^edit_this$/, /^my-status$/,
  /^_copy$/, /^gpt-/, /^checkout\./, /^footer\./, /^\[?\{/,
  /^"default/, /^\/status\//, /^\/your\//, /^example\.com/,
  /^AZURE_/, /^AccessKey/, /^OAuth/, /^Client /, /^Webhook URL/,
  /^API URL$/, /^Well-Known/, /^Worker URL$/, /^Uptime Kuma/,
  /^New API/, /^Baidu V2$/, /^Zhipu V4$/, /^Quota:$/,
]

const brandNames = new Set([
  'AIGC2D','Anthropic','API2GPT','Claude','Cloudflare','Cohere','DeepSeek',
  'Discord','DoubaoVideo','FastGPT','Gemini','GitHub','Jimeng','JustSong',
  'LingYiWanWu','LinuxDO','Midjourney','MidjourneyPlus','MiniMax','Mistral',
  'MokaAI','Moonshot','NewAPI','OhMyGPT','Ollama','OpenAI','OpenAIMax',
  'OpenRouter','Passkey','Perplexity','QuantumNous','Replicate','SiliconFlow',
  'Stripe','Submodel','SunoAPI','Telegram','Tencent','Vertex AI','VolcEngine',
  'WeChat','Xinference','Xunfei','AI Proxy','One API',
])

const locales = ['fr', 'ja', 'ru', 'zh', 'vi']

for (const locale of locales) {
  const locFile = JSON.parse(await fs.readFile(path.join(LOCALES_DIR, `${locale}.json`), 'utf8'))
  const locTrans = locFile.translation
  const untranslated = {}

  for (const [key, enVal] of Object.entries(enTrans)) {
    const locVal = locTrans[key]
    if (locVal === undefined || locVal !== enVal) continue
    if (brandNames.has(key)) continue
    if (skipPatterns.some(p => p.test(key))) continue
    if (typeof enVal === 'string' && enVal.length < 4) continue
    if (/[a-zA-Z]{3,}/.test(String(enVal))) untranslated[key] = enVal
  }

  const count = Object.keys(untranslated).length
  if (count > 0) {
    console.log(`\n=== ${locale} (${count} untranslated) ===`)
    for (const [k, v] of Object.entries(untranslated))
      console.log(`  ${JSON.stringify(k)}: ${JSON.stringify(v)}`)
  } else {
    console.log(`\n=== ${locale}: all translated ===`)
  }
}

Step 4: Add translations

Create web/default/scripts/add-missing-keys.mjs with this structure:

import fs from 'node:fs/promises'
import path from 'node:path'

const LOCALES_DIR = path.resolve('src/i18n/locales')

function stableStringify(obj) {
  return JSON.stringify(obj, null, 2) + '\n'
}

const newKeys = {
  en: { /* "key": "English value" */ },
  zh: { /* "key": "中文翻译" */ },
  fr: { /* "key": "Traduction française" */ },
  ja: { /* "key": "日本語翻訳" */ },
  ru: { /* "key": "Русский перевод" */ },
  vi: { /* "key": "Bản dịch tiếng Việt" */ },
}

async function main() {
  let totalAdded = 0

  for (const [locale, trans] of Object.entries(newKeys)) {
    const filePath = path.join(LOCALES_DIR, `${locale}.json`)
    const json = JSON.parse(await fs.readFile(filePath, 'utf8'))

    let count = 0
    for (const [key, value] of Object.entries(trans)) {
      if (!Object.prototype.hasOwnProperty.call(json.translation, key)) {
        json.translation[key] = value
        count++
      } else if (json.translation[key] !== value) {
        json.translation[key] = value
        count++
      }
    }

    if (count > 0) {
      json.translation = Object.fromEntries(
        Object.entries(json.translation).sort(([a], [b]) => a.localeCompare(b))
      )
      await fs.writeFile(filePath, stableStringify(json), 'utf8')
    }

    console.log(`${locale}: ${count} translations applied`)
    totalAdded += count
  }

  console.log(`\nTotal: ${totalAdded} translations applied`)
}

main().catch((err) => { console.error(err); process.exitCode = 1 })

Populate the newKeys object with actual translations for each locale.

Step 5: Verify and clean up

cd web/default
node scripts/add-missing-keys.mjs   # apply translations
node scripts/find-missing-keys.mjs  # verify: should say "All t() keys found"
bun run i18n:sync                   # normalize file order

Delete temporary scripts after completion.

Translation Guidelines

Keep as English (do not translate):

• Brand/product names (OpenAI, Claude, Gemini, etc.)
• URLs and email placeholders
• Technical identifiers (JSON keys, API paths, model names)
• Code-like strings (gpt-3.5-turbo, price_xxx, etc.)

Always translate:

• UI labels, button text, error messages, descriptions
• Time units (hours, minutes, months, years)
• Action words (Move, Show, Delete, etc.)

Key Rules

1. All scripts run from web/default/ directory
2. Use node scripts/xxx.mjs (ESM format with top-level await)
3. Sort keys alphabetically when writing locale files
4. Always run bun run i18n:sync as the final step
5. Delete temporary scripts after completion
6. The {{variable}} placeholders in keys must be preserved in all translations