In our organisation we come across a similar requirement, is there an option in frame maker to translate the Frame Maker file content from English to some other language ?
Generally companies outsource the FM content files in one language to a translation service that then returns the translated content in either FM format or .MIF files. Some places have in-house translation resources and just make a copy of the original FM files and create translated versions themselves with it.
Since FrameMaker 2020, you can also save a document or all documents in a book directly as a translation package containing pre-segmented XLIFF files. You can send the package to your translator and they return the translated XLIFF files to you. You can then import it and get the translated book.
You can find more details in the FrameMaker Online Help: