To make a chatbot multi-lingual, start by selecting a language translation service or integrating APIs like Google Translate or Microsoft Translator. These tools allow your chatbot to understand and respond in multiple languages. Next, structure your chatbot to detect the user’s language, either through explicit selection or automatic detection. Ensure that responses are contextually accurate and culturally appropriate. Additionally, use Natural Language Processing (NLP) platforms that support multi-lingual capabilities, such as Dialogflow or Wit.ai. Regularly update and test the bot to maintain quality and accuracy in every language, providing an inclusive experience for all users.