Multi-languages is managed with multi-projects.

If you need to create posts in multiple languages, we recommend setting up a project per language. This has multiple benefits since you can manage per project and thus language:

post analytics.
feedback and reactions.
the labels used to classify posts.
the integrations with third-party services.
the Timeline and Widget options.
the default texts for the Timeline and the Widget.
who has read and write access (collaborators).