I have a problem with some Xubuntu apps like GMusicBrowser in which they appear all in Japanese and I don't know how to fix it to show them up in native Spanish. Could somebody help me in that?
I'm going to take a wild guess and assume that you had a problem similar to mine, when I installed xubuntu, I selected english but many things appeared in arabic, because I selected Lebanon from the installation wizard.
to fix this settings -> language & support, language for menus and windows spanish -> apply system wide
regional formats spanish -> apply