Have any of you done cover songs in a language that isn't known to you?

[~Derek~]

Have any of you done cover songs in a language that isn't known to you? Like in Norwegian or Swedish if you just speak English? Because I was looking at some songs off Satyricon's Nemesis Divina to do a cover of and I got the vocal patterns recognized for the Norwegian songs, I just don't quite know what they're saying, in other words I'm only memorizing phonemes. have any of you tried doing this before?