Setting up chat bots with automatic language detection

I set up chat bots that eliminate one of the most annoying problems in online support — guessing which language to respond to the visitor in. The bot first checks the browser language, and if that signal is unavailable, it analyzes the first message the person wrote in the chat and determines the language from it. No forms or lists before getting an answer — the conversation starts immediately in the right language.

Inside, I keep the entire knowledge base unified rather than creating a separate bot for each language. Each answer and scenario exists in one place and automatically displays in the language the visitor needs. Updating a price just once — and it's immediately correct in all language versions. If a visitor wants to switch manually in the middle of a conversation, one click changes the language without losing context.

I handle all the setup: connecting the widget to the site, logic for determining language by browser and message text, assembling a common knowledge base and checking edge cases — mixed language in one message, proper fallback for unsupported languages. What the work includes:

— automatic language detection by browser and first message;
— manual language switching with one click during dialogue;
— unified knowledge base for all languages without duplication;
— graceful fallback if visitor's language is not supported;
— testing on real scenarios with mixed-language communication.