It is only possible *for Lemmy users *to specify the language via the web app and possibly some other apps. The post above is written by a Mastodon user, so there is no option to set the language. However, this entire community here is primarily German-speaking. If I only allow German as a language for this community, it is no longer possible for Lemmy users to post in English. (which will be the exception, but I didn’t want to exclude non-German speakers)