Changelog

GET /v1/agents/voices now returns a multilingual_languages array alongside the voice catalogue. It lists every language an agent may declare in additional_languages — read it rather than hard-coding a list, because the supported set grows as the voice catalogue expands and a stale client-side list would offer languages the server rejects on save.

This extends the multilingual agents support introduced on 2026-07-24. The shape of additional_languages is unchanged: each entry is a BCP-47 tag, must be unique per agent, and must differ from the agent’s default language.