How to create a mutilingual bot?

I have 3 config files for english, french, german language Json files in a config forlder. But dont know how to run these files with the code ‘rasa train’ it is asking config file again. And i have multiple NLU file also for these three different languages. Can someone give suggesion how to build a mutilingual chatbot?

Could you please share your config for NLU? And your folder structure + used commands + Rasa version would be great. Thanks :pray: