Multilingual TTS: Complete Guide to 50+ Languages

Your product deserves to speak every language your customers do. Speeko supports 50+ languages through a single API.

Supported Language Families

Germanic: English (US, UK, AU), German, Dutch, Swedish, Norwegian, Danish

Romance: Spanish (ES, MX, AR), French (FR, CA), Italian, Portuguese (BR, PT), Romanian

Slavic: Russian, Polish, Czech, Ukrainian, Bulgarian

Asian: Mandarin, Cantonese, Japanese, Korean, Vietnamese, Thai, Hindi, Bengali, Tamil

Middle Eastern: Arabic, Hebrew, Turkish, Persian

Others: Indonesian, Malay, Tagalog, Swahili, Greek, Finnish, Hungarian

The voice parameter encodes both language and voice character:

{
  "text": "Hello, world",
  "voice": "en_us_heart"
}

{
  "text": "Merhaba dünya",
  "voice": "tr_female_aylin"
}

For code-switching content (English with Spanish phrases, for example), use SSML language tags:

<speak>
  Welcome to the show.
  <lang xml:lang="es-MX">¡Hola amigos!</lang>
  Back to English now.
</speak>

Translate, don't just transliterate — Professional translation first, TTS second
Match regional accents — Mexican Spanish voice for Mexican audience
Respect formality levels — Japanese has three; pick the right one
Handle dates/numbers — 2026-04-15 reads differently per locale
Test with native speakers — Always verify before launch

All 50+ languages priced identically: $0.03 per 1K characters. Spanish doesn't cost more than English. Arabic doesn't cost more than French.