Most of the lyrics are in German. Acording to the Da Da Da Songfacts, the full name of the song is "Da Da Da du liebst mich nicht du liebst mich nicht aha aha aha," which translated to English as "Da Da Da I don't love you you don't love me aha aha aha."
What you will and what you won't
What you do and what you don't
What you can and what you can't
This is what you need to know: