Eleven v4 on Sume lists 44 language codes, not 90+

Sume's TTS Router publishes 44 ISO 639-1 language codes for eleven-v4, not the 90+ languages ElevenLabs states for Eleven v4. The same 44 apply to eleven-v4-turbo and eleven-v3. eleven-multilingual-v2 lists 28 codes and eleven-turbo-v2.5 lists 31. A language outside that list is one Sume's catalog does not promise, so test it by ear first.

Read from Sume's code on main and from ElevenLabs' models page, both on 2026-10-11.

Why does the Sume count differ from ElevenLabs' count?

The two numbers measure different things. ElevenLabs counts languages and dialects the model can speak. The Sume catalog row stores ISO 639-1 two-letter codes, and a language without a two-letter code, Filipino for example, is not in the list. The catalog source says this outright for Multilingual v2: 28 ISO codes, because Filipino has no 639-1 code. ElevenLabs' page lists 29 languages for that model.

For v3 and v4 the catalog notes that the two families cover 70+ languages and lists only the codes it can name and share. In the code, that list is the union of the Turbo v2.5 codes and the Sonic 3 codes, which is 44 codes in total.

Which codes does each Eleven row list?

The counts below are the length of each row's capabilities.languages array in the catalog.

What happens if my language is not in the list?

Check the catalog before you submit. GET /v1/tts-router/models/eleven-v4 returns the row with its capabilities.languages array, so a script can test "vi" in languages instead of discovering a problem after the job has been billed.

Sume's TTS also tags each voice with a language and warns when a voice and a requested language do not match, so pick a voice that is meant for the language you send. For a language that only ElevenLabs lists, run a short test line and listen to it with a native speaker before you commit a long script.

How do I choose a row for a non-English script?

Start with eleven-v4-turbo if your language is in the 44-code list and you want the lower price, move to eleven-v4 when delivery matters, and use sonic-3.6 if you want the same 44 codes at the lowest per-character rate. If the language is only in ElevenLabs' longer list, the Sume catalog does not list it, so use another tool for that language.

See Text to speech in Japanese for a worked non-English request.