Ey there!
this is not a Tails request, but maybe you want to help out translating
the next OnionShare.
This application comes with Tails, and is very easy to use. It is also
available in Debian and other platforms, and allows you to easily share
a file through a Tor onion service.
you can translate it at
https://hosted.weblate.org/projects/onionshare/translations
thanks in advance!