Does the same song in different languages have different powers?
If they’re languages he understands, the inevitable differences imposed by translation will change the “context” which his magegift uses to decide on an effect. Most likely this will simply act in much the same way as two different performers’ versions of a song, but it could have more dramatic effects. Note that this has so far not happened in-game or in the Walk. If he comes across the original Japanese version of “Boku wa Pioneer” (“I’m A Pioneer”, from Tenchi Muyo!), we could see this tested, though.