Dear Guest "not me yet", a friendly warning. Your post is entirely in good faith and you intended no wrong; however there is a Mudcat policy regarding public posts online, and e-mail addresses. You seem to be unaware of this policy.

What you specifically ask after is:
"Das Bandel," K. 441 (catalogue of Mozart's complete works)

As my previous post points out, an English translation -- singable, not literal -- exists, by the late Anne C. Grossman; she was, amongst other things, the niece of violinist Jascha Heifetz. She translated a number of standard-repertoire opera libretti into singable English. Her translations without a doubt are under copyright control.

There must be literal, prosaic English translations of Mozart's naughty words out there, but I have yet to look closely for them, so I can't link you to them.