Second Language Support for Site (registration) and/or Courses

Hi community,
Has anyone provided additional language support for either courses or creating accounts or administrative functions (orders, payment) on their sites? Do you have any recommendations for what works well? I don’t know if this is supported.

We’ve had an invididual use browser translation in the past and he got stuck in payment. For certain use cases, we would be interested in exploring capabilities. We do have the learning groups option and this might be a good use case for a micro-site.

Thanks for your thoughts and insights. -Dave