Yes, it should GERMAN LIED, and not LEID. Can't keep the I before E rule straight in English, much less German.

I listened to some John Lee Hooker today. He did a lot of humming while singing, to fill in gaps.

Interesting point on English using assonance to rhyme. I've read about that, and I know that Spanish, with its strict conjugation rules, has an easier time with rhyming.