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miccho27
miccho27

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Free AI Translation API — 44 Languages, No Google Cloud Billing, Zero Config

#ai #api #javascript #python

Google Translate API costs $20 per million characters. DeepL's free tier caps at 500,000 characters/month with mandatory API key registration. For a side project that needs basic translation, that's overkill.

I built a free AI Translation API powered by Cloudflare AI (Meta's multilingual model) that supports 44 languages with zero configuration. No billing account, no OAuth, no SDK — just an HTTP request.

Supported Languages

English, Spanish, French, German, Italian, Portuguese, Dutch, Polish, Russian, Chinese, Japanese, Korean, Arabic, Hindi, Turkish, Vietnamese, Thai, Indonesian, Czech, Romanian, Danish, Finnish, Hungarian, Norwegian, Swedish, Ukrainian, Bulgarian, Greek, Croatian, Slovak, Slovenian, Serbian, Lithuanian, Latvian, Estonian, Maltese, Irish, Welsh, Afrikaans, Swahili, Hausa, Igbo, Yoruba, Zulu.

Quick Start 

curl -X POST "https://ai-translate-api.p.rapidapi.com/translate" \
  -H "Content-Type: application/json" \
  -d '{
    "text": "The quick brown fox jumps over the lazy dog",
    "source": "en",
    "target": "ja"
  }'
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Response:

{
  "translated_text": "素早い茶色の狐が怠惰な犬を飛び越える",
  "source_language": "en",
  "target_language": "ja",
  "model": "meta-multilingual"
}
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JavaScript — Internationalize Your App 

async function translate(text, source, target) {
  const response = await fetch(
    'https://ai-translate-api.p.rapidapi.com/translate',
    {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ text, source, target })
    }
  );
  const data = await response.json();
  return data.translated_text;
}

// Translate UI strings
const greeting = await translate('Welcome back!', 'en', 'es');
console.log(greeting); // "¡Bienvenido de nuevo!"

// Batch translate
const languages = ['es', 'fr', 'de', 'ja', 'ko'];
const translations = await Promise.all(
  languages.map(lang => translate('Hello, world!', 'en', lang))
);
console.log(translations);
// ["¡Hola, mundo!", "Bonjour, le monde!", "Hallo, Welt!", "こんにちは、世界！", "안녕하세요, 세계!"]
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Python — Translate Content Files 

import requests
import json

def translate(text: str, source: str, target: str) -> str:
    response = requests.post(
        "https://ai-translate-api.p.rapidapi.com/translate",
        json={"text": text, "source": source, "target": target},
        timeout=15
    )
    response.raise_for_status()
    return response.json()["translated_text"]

# Translate a JSON locale file
with open("en.json") as f:
    en_strings = json.load(f)

ja_strings = {}
for key, value in en_strings.items():
    ja_strings[key] = translate(value, "en", "ja")
    print(f"  {key}: {ja_strings[key]}")

with open("ja.json", "w", encoding="utf-8") as f:
    json.dump(ja_strings, f, ensure_ascii=False, indent=2)
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Use Cases

Scenario How
i18n for side projects Translate UI strings without paying for Google Cloud
Chat apps Real-time message translation between users
Content tools Auto-translate blog posts or product descriptions
Email templates Localize transactional emails
Documentation Quick-translate README files

Comparison

Feature This API Google Translate DeepL Free
Price Free (500 req/mo) $20/M chars Free (500K chars/mo)
Auth required No Yes (billing account) Yes (API key)
Languages 44 100+ 31
Setup time 0 minutes 15–30 minutes 5 minutes
Cold start None None None

If you need 100+ languages or neural machine translation quality for production, Google or DeepL are better. For side projects, prototypes, and internal tools — this is faster to integrate and costs nothing.

Try it free on RapidAPI →

Part of a collection of 24 free developer APIs — all running on Cloudflare Workers.

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