How many languages does Synthesia support?
As of 2026-07, Synthesia supports 160+ languages and accents for generating avatar speech, paired with 1,000+ AI voices. Its one-click translation feature can convert an existing video into 80+ languages, and AI dubbing preserves lip-sync in the new language. All paid tiers, and the free plan, include the full language range.
Why — the first-principles explanation
The language count comes from Synthesia's text-to-speech engine, not the avatars. Because the avatar's job is just to lip-sync to audio, adding a language mostly means adding voices that can pronounce that language naturally. That's why the numbers split into two figures that sound different but aren't contradictory.
The 160+ languages figure is how many languages you can type a script in and have an avatar speak from scratch. The 80+ languages figure is for one-click translation, taking a finished video and automatically re-generating it in another language. Translation is a harder, more automated task (it rewrites the script, swaps the voice, and re-syncs the lips), so its supported set is smaller than the raw speaking set.
The reason this matters is localization at near-zero cost. Normally, a video in 30 languages means 30 scripts, 30 voice actors, and 30 edits. Synthesia collapses that: write once, then translate, and the same avatar 're-speaks' each version with correct lip movements via AI dubbing. For global companies, that's the headline value, one training video becomes dozens of localized versions in an afternoon.
One nuance: language support isn't the same as flawless quality. Widely spoken languages tend to have the most natural voices and the widest selection, while rarer languages may have fewer voice options. So '160+' is the breadth; the depth varies by language.
An example that makes it click
Imagine a jukebox that knows the same song in 160 languages. You feed it the lyrics (your script), press a language button, and out comes the tune sung correctly in that language, with the singer's mouth matching the words.
Now the clever part: you can also drop in a song already recorded in English and press 'translate.' The jukebox rewrites the lyrics into, say, Japanese and re-sings it in a Japanese voice, moving the mouth to fit, that's the 80+ language one-click translation. One recording, dozens of versions, no new singers hired.
Key facts
- Synthesia supports 160+ languages and accents for generating avatar speech (as of 2026-07).
- It offers 1,000+ AI voices across those languages.
- One-click translation converts an existing video into 80+ languages.
- AI dubbing preserves lip-sync when translating a video into a new language.
- The full language range is available across plans, including the free tier.
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How many languages does Synthesia support? As of 2026, over 160 languages and accents for generating avatar speech, paired with more than a thousand AI voices. You'll also see a second number, 80-plus languages, and here's the difference. The 160 figure is how many languages you can type a script in and have an avatar speak from scratch. The 80 figure is for one-click translation, taking a finished video and automatically re-making it in another language. Translation is harder because it rewrites the script, swaps the voice, and re-syncs the lips, so its list is a bit shorter. Why does this matter? Localization at almost no cost. Normally a video in thirty languages means thirty scripts and thirty voice actors. Synthesia lets you write once, then translate, and the same avatar re-speaks each version with matching lip movements through AI dubbing. Just remember, widely spoken languages have the most natural voices; rarer ones may offer fewer choices.
What authoritative sources say
People also ask
Why do I see both 160+ and 80+ language numbers?
160+ is how many languages an avatar can speak from a typed script. 80+ is how many languages the one-click translation feature can convert an existing video into. Translation supports a smaller set.
Does the free plan include all languages?
Yes. Synthesia's full 160+ language range is available across plans, including the free tier, so you can test any language before paying.
Does translation keep the lip-sync?
Yes. Synthesia's AI dubbing re-syncs the avatar's lips to the translated audio, so the mouth movements match the new language, not the original.
Are all languages equally high quality?
Not exactly. Widely spoken languages tend to have more natural voices and more options, while less common languages may have fewer voice choices.