Of course the English have the longest spelling. Why write “paz” or “pau” or “pís” when you can add two more letters? Even French did not fuck it up as much.

Use Friede and you already save one letter though it might carry religious overtones. Writing Fride might be ambiguous in spelling but as there’s no “Fridde” it’s not actually a problem. In any case the root is “Fried” (and yes belfries might have gotten their name from there) and you can be sure both Frieden and Friede are pronounced like that somewhere (over here it’s Friedn and Friede), and as German spelling doesn’t (officially) use apostrophes all over the place when spelling out contractions and everything writing Frid would be highly non-standard, but you’d definitely get away with it in a poem. Just don’t show it to someone who studied Germanistik auf Lehramt.

I’ve heard the Slavic one pronounced “meer”, I think that’s more common than “myoor”.

Works for Romanian though, that’s pronounced “patch-eh”

myoor

That does not sound close. The slavic* word for peace is me-r, “me” as in “me” and “r” is rolling “r”. Mostly everyone can pronounce this correctly.

*Polish (and sometimes others) say “po-ko-i” instead, Ukrainian has a different pronunciation, Latvian (is balto-slavic, I know) adds “-s” at the end.

I would have said 平和 (heiwa). As another learner, I’ve never seen 安泰, and ピース I see mostly used as a reference to the “peace sign” (the hand gesture).