Created attachment 575234 [details]
With activated nls USE flag, uGet GUI remains solely in english:
Installed versions: 2.2.0(05:28:25 04/05/2019)(aria2 libnotify nls openssl -ayatana -control-socket -gnutls -gstreamer -rss)
Description: Download manager using gtk+ and libcurl
Maybe I'm missing something?
I can confirm the bug. The source tarball contains many po files, but translation files don't get installed.
My settings in make.conf are