Languages Synthesia publishes for
Synthesia (synthesia.io) declares nine same-host language versions of its site and publishes a 143-row table of named languages and dialects for its translation feature. Its own feature page headlines 160+ languages and accents while the selector on that same page reads 140+. As of 2026-09-22.
| Column | Count | Codes |
|---|---|---|
| Site languages | 9 | de, en, es, fr, it, ja, nl, pt-BR, sv |
| Output languages | No list published | - |
| Voice languages | 143 named | languages and dialects, translation feature |
Inclusion rule. The same three columns are kept for every tool in the register; a column the vendor does not publish is recorded as no list rather than filled from a product description. Order. Fixed column order, identical on every tool page.
1A 143-row table, and three different numbers around it
The documentation page is headed for all languages and dialects supported by the translation feature and lays them out as a table: a name, a code in capitals and a code in the ordinary form, one row each, from Afrikaans through Arabic and its 13 named regional variants and on to the end of the alphabet. Counting the rows gives 143. The page itself prints no total.
The feature page reached from the main navigation gives two other figures. Its headline offers 160+ languages and accents; the language selector shown on the same page says 140+. Three numbers for one inventory, all published by the same vendor on the same day, and the only one a reader can verify is the one nobody wrote down. The register fills the cell from the table, because a row a buyer can search is worth more than a headline they cannot.
2The list is for translation, not for the script
The heading on the table is specific: these are the languages and dialects supported for the translation feature. That is a claim about turning an existing video into another language, which in this register belongs in the voice column. It is not a claim about what language a generated script, outline or scene description arrives in, and no rule about that appears on the pages read.
The middle column therefore stays empty, which puts this row with almost every other entry here. It is a striking place for a vendor to stop. A company willing to publish 143 named rows is evidently comfortable documenting itself in detail; the sentence a production actually needs, about what language the paperwork comes out in, is a single line and it is not there.
3Nine site alternates behind a claim of a hundred and sixty
The declared site set is German, English, Spanish, French, Italian, Japanese, Dutch, Brazilian Portuguese and Swedish: nine, all on the same host, mostly Western European with Japanese as the single exception. Against a headline offering 160+ languages that gap is worth stating plainly, because it is the gap the three columns exist to make visible.
Neither number is wrong. A translated marketing site is written by people and a voice inventory is assembled from models, so there is no reason for them to converge, and nine well-run language editions is a normal amount for a company selling into Europe. What would be wrong is reading 160+ as a statement about the site, or nine as a statement about the voices, and that is the error a single merged coverage figure invites.
4Sources
The table is counted on the supported languages documentation and the two advertised figures are read from the languages feature page, with alternates counted on synthesia.io, all 2026-09-22.
5Where this entry sits in the register
| Tool | Voice languages |
|---|---|
| CapCut | No list published |
| D-ID | 120+, count only |
| Fliki | 91 named, plus 117 dialects |
| Hailuo | No list published |
| HeyGen | Two named lists, no total |
| Higgsfield | No list published |
| invideo AI | No list published |
| Kling AI | Five, count only |
| LTX Studio | No list published |
| Pika | No list published |
| PixVerse | No list published |
| Rask AI | 135+, count only |
| Runway | No list published |
| SceneMixer | 15, plus Cantonese for dialogue |
| Synthesia | 143 named |
| VEED | 29 dub-to, 72 detectable |
| Vidnoz | 100+ and 140+, counts only |
| Vidu | No list published |
Inclusion rule. Tools with a public English site selling AI video generation or AI video dubbing. Site languages count hreflang alternates served from the host being read; x-default and alternates pointing at another host are not counted, for every vendor alike. Order. Alphabetical by tool name.
Next entry in the register: VEED. Previous entry: SceneMixer. Every tool side by side is in the register, and the rule behind each count is on the how counted page.
- Site languages9 languages: de, en, es, fr, it, ja, nl, pt-BR, svdeclared as same-domain alternates
- Voice languagesA table headed “All languages and dialects supported for Synthesia translation feature”, running 143 named rows from Afrikaans to Zulunamed list published
- Voice languagesArabic appears as a base entry plus 13 named regional variants, from Bahrain to Yemen, inside the same 143-row tableone language's variants inside the list
- Voice languagesThe feature page is headed “Make Videos in 160+ Languages & Accents in 5 Mins” while the selector on that same page reads 140+two counts on the vendor's own pages
- Output languagesNo public list (as of 2026-09-12)no list published