[rab, Raak] It's interesting to hear where you all pick up your quotations from. My German ones all come from 'Schubert - 200 Songs for Voice & Piano' selected and edited by Sergius Kagen [IMC. New York]. It contains the English translations which, given the somewhat florid, overblown nature of the romantic verse, are chucklesome enough [even before you lot apply your skills to them].
At this point in time, I cannot do justice to Rosie's last quote so I'm leaving it for someone who can.

[Chalky] To be fair to dear Franz, the only Lied I know in any detail had its lyrics written by Heine. But then I'm quite a fan of his, feeling him in many people's minds to be cast in Beethoven's shadow. In the meantime...

He who is sardined in terror, is sardined into the gay bus.

Hyvaa Joulua ja Onnellista Uutta Vuotta

Never joke with the honesty of the floating voter.

Hänchen klein, ging allein, in die weiter Weld hinein.

[Darren] Marvellous stuff. Do I sense the germination of a new game here?

Clean your hands, my gang allies, in the water behind the weld.

Tack för det!

Thanks all for the comments! I was rather worried someone else would come up with a better "translation" while I was working on mine, but that didn't happen luckily. Incidentally, I get my quotes and proverbs from a variety of sources: some from the Oxford Dictionary of Quotations, and others from online proverb collections.

[rab] Thank you for reminding me of the Finnish for Merry Christmas and a Happy New Year. Finnish is truly opaque, and the only word in the phrase that has any relationship to other languages as far as I know is "Joulua", which is "Yule" with a nice Finnish suffix.

(Use a) nail for that!

Lapin Kulta

This phrase, decorously expressed in Latin, occurs in a Victorian anatomical guide to the fair sex written for young men (who are assumed virtuously innocent of such knowledge).

Costain Skanska Bafry