How to change the UI language on Clementine?

This looks like a bug in clementine or at least in the version that comes packaged with Ubuntu. I use it on my Debian and have not seen this before but I installed it today on a VM running Ubuntu and it appeared in French. I live in France but have absolutely nothing set to French on my system, much less the VM.

So, it looks like Clementine is assuming the language based on your IP or some other silly method. The good news is that there is a setting for that, at least on version 1.1.1 which is what is in the 13.10 repositories.

Just go into "Tools" => "Preferences" => "Behavior" and change the language:

I agree with terdon that the application is buggy, but it does check the locale, it's just that it checks the wrong locale category: LC_NUMERIC.

Now, the solution suggested by terdon is reasonably the best. Just wanted to show a way to workaround the bug:

$ cat ~/bin/clementine
#!/bin/sh
export LC_NUMERIC=$( printenv LANG )
exec /usr/bin/clementine "$@"

I simply put the file clementine in my ~/bin folder and set the executable bit (chmod +x).