It replies in the language your visitor writes in
Somebody writes to your chatbot in German. It replies in German.
There is nothing to configure and no language picker for the visitor to find. It reads the message and answers in the same language.
Your knowledge base stays in one language — whatever your website is written in. The agent works from that and answers in theirs.
Supported languages
It handles the languages the underlying model handles, which covers all the major European and Asian ones and a long tail beyond them.
For anything unusual, the practical test is faster than a list: create a free agent, write to it in that language and see what comes back.
One knowledge base, many languages
You write your knowledge base once, in whatever language your site is in. The agent translates as it answers.
Where you want an exact wording in a specific language — a legal line, a brand phrase — add it as a question and answer pair in that language and it will use it verbatim.
Interface language and region
Separately from what the agent speaks, the widget interface has its own language setting, and a time zone that controls how it reads your working hours.