I love music, that isn't english based
And Tarin, I did a bit of digging, a bit back, I believe Omnos is actually Gaulish, not Gaelic.
Okay my little list, some may be sung in both english and the other language
Fleur Du Mal Sarah Brightman (French/English)
Life is like a Boat Rie Fu (Japanese/English)
Tunak Tunak Tun Daler Mehndi (Indian, i think)
Sarah Brightman and Andrea Bocelli (Italian/English, I think)
Enigma (French/Latin, I think)
Enya (Not even sure on this one, Gaelic maybe)Er