Indian customers rarely pick one language per sentence. Chatterbox replies in English, Hindi and Hinglish out of the box, in whichever the visitor used, and paid plans translate the knowledge base into further languages. Answer quality still depends on what your site published.
Read a week of your own WhatsApp enquiries and count how many are in one language. Almost none will be. A customer asks "bhaiya delivery Mohali me hoti hai kya", then switches to English for "and what's the warranty period", then back for "abhi order karu to kab tak aayega". Same person, same conversation, three registers.
A chatbot that expects a language to be chosen from a dropdown at the start of the conversation is built for a country where people choose one.
What a Hindi AI chatbot has to survive
Devanagari is the easy case. A visitor typing "क्या आप चंडीगढ़ में डिलीवरी करते हैं" is unambiguous, and any competent model handles it.
The hard case is Hindi in Roman script with no fixed spelling. "kitna", "kitnaa", "kitne ka", "kitne ki". "nhi", "nahi", "nahin". Product names in English, verbs in Hindi, numbers in either. Add the abbreviations people use when typing on a phone, and you get lines that no language-detection library will confidently label.
Then there is the mix inside a single sentence: "sir aapka minimum order value kya hai for free delivery". English nouns, Hindi frame. That is the sentence your chatbot will see most.
How Chatterbox handles it
English, Hindi and Hinglish work without configuration. The bot replies in the language the visitor used, so a Hinglish question gets a Hinglish answer rather than a formal Devanagari paragraph the customer then has to parse.
You can also set the widget's default language, which is what the visitor sees before they type anything. Whether the opening line is English or Hindi changes who feels invited to ask, and on a lot of Indian sites the honest default is not English.
Beyond those three, translating the knowledge base into further languages is a plan feature. Free covers English. Starter adds one extra language. Pro adds more, and the current per-plan count is on the pricing page. The dashboard lists the languages available and the state of each one, so "why can't I add Punjabi" is answered before you ask.
Pre-sales and support in two languages at once
The commercial value is not translation, it is the customer who would not have typed at all in English.
Someone comparing three fabricators for a balcony grill has a question about material thickness and does not have the English vocabulary for it, or has it and does not want to spend the effort at eleven at night. They ask in Hindi, get the answer your site published in English, and stay. When the answer is missing, the bot asks for a phone number in the language they were already using, and you call back. The lead capture behavior is the same across languages.
Your content is still the ceiling
A translated answer cannot be better than the answer it came from. If your website says "pricing varies as per requirement", the Hindi version of that sentence is equally useless, and you have now disappointed the customer in two languages.
Three specific things go wrong:
Untranslatable specifics. Product names, model numbers, scheme names and legal terms should stay as they are. A translation that helpfully renders your product name into Hindi has made it unsearchable for the customer holding the box.
Terms with no clean equivalent. "EMI", "GST invoice", "warranty" and "refundable deposit" are usually left in English by your customers too, so leaving them alone reads more natural than translating them.
Regional languages you have not paid for. Chatterbox does not silently answer in a language your plan has not translated the knowledge base into. That is a limit worth knowing before you promise a client Marathi support.
Before you turn it on
Check the twenty questions you actually receive, in the language they arrived in, and confirm each has a published answer. The content checklist walks that afternoon. Language support fixes how the answer is delivered. It does not create an answer that was never written down.
If your customers already mix languages at you, start free, paste the script tag, and ask your own bot a Hinglish question before you decide anything.