Hello! Is it okay to build backlinks on a website which doesn't have the same language than our sites? (With anchor text in our language) I mean will it count as a "good" backlinks for a good ranking in SERPS and others stuffs like that?
I don't think there is any differentiation based on language in SERPS, although it stands to reason your own language(that is whatever your site is written in) would be slightly better. For profile style links, this works quite well in fact.
From my point of view , i would advise not getting many links from websites speaking a different language , as it may look spammy to the search engines.