At the moment, what you have access to is the Fluent Forever beta. This version is for testing and bug fixing purposes mostly. We are still creating all the content for all languages promised. As we finish them, even in part, we will add them to the beta for testing. When we release the app, we will have the languages out in full.
Here is an overview of what languages come out in what phase:
Also, our progress website will always be updated with he latest info on the app and the language timelines: