Google did a very good job of translating "Summertime" into German and back, but it messed up on that one line:

"...
Oh, your daddy is rich and your mamma's good looking,
So quiet, little baby do not cry.

One of these mornings you're gonna rise up singing ..."

After the double translation:

"...
Oh, your daddy's rich and your mama's good looking,
So hush, little baby, don't you cry.

One of them will you get up in the morning are singing ..."