Supported Languages
Phonic agents recognize and speak the 51 languages below. Use the code in the Language ID column wherever the API takes a language: default_language and additional_languages when you configure an agent or start an agentless conversation.
Codes are ISO 639-1 two-letter codes, except Filipino (fil) and Cantonese (yue), which have no ISO 639-1 code.
Using more than one language on a call
An agent has one default_language and any number of additional_languages, and multilingual_mode controls how it moves between them. See Multilingual Agents for the switching modes and for how welcome and check-in messages behave.
Declare only the languages you actually expect on calls. Adding languages “just in case” makes recognition harder, not more flexible.