Hey @verdulo,
I’m sorry to hear you are having problems with getting a language onto F-Droid.org, but happily you’ve understood why we are having this problem.
As @hans already said multiple times, there likely isn’t anybody understanding Esperanto from F-Droid’s core team, so discussions like which language should go to F-Droid.org need to happen in English, F-Droid’s official language used to communicate between its contributors. As your post here in the forum is not written in English, I moved it to the Other languages category as we try to make the popular categories a place for everybody to understand, and that’s mostly possible in the language spoken and understood by the most people: English. I hope you understand.