https://translations.launchpad.net/widelands/trunk/+pots/texts

I dont feel 100% comfortable translating a GPL license file because the license specifically states that you can distribute but not modify said file. I found a finnish translation on the web (by finn legal firm) which might be open for use but there's no guarantee. Not many projects translate their text files. I only see gettext used inside programs.

Suggestion: Remove Launchpad translation of all widelands text files or atleast COPYING

I guess the whole /txts directory needs a Cleanup. The COPYING file doesn't belong there, I think. I'd put that file into the root, or in a subdirectory "License". No need to translate the GPL, as Sahtor already said. Additionally, this directory contains texts used ingame, and texts not used ingame. Could be separated, and for the Ingame texts a translation should be proposed.

The License can be shown from inside widelands and it is in the texts/ directory formatted using the widelands rich text language so that we can properly display it. There are translations from the GPL, simple copy & paste should do.

Other possibility is to only ship a plain text english GPL and move the license away. But then the license button inside the game must be removed as well.