Some issues with Esperanto support

Sadly Esperanto is still not fully supported in flutter. https://github.com/flutter/flutter/issues/72422

We can use this https://pub.dev/packages/l10n_esperanto (I tried) but this should also be merged for our current flutter version:

But still there is some issue with numberformat that we should test and fix:

I disabled it until this is fixed in the dropdown menu.

We can do also like with Asturianu that we use Spanish as fallback.

cc@flodef

Edited Sep 30, 2023 by vjrj