ABOUT IT

Chinese 

板上釘釘 (no two ways about it, that clinches it, that's final), 再說 (besides, let's talk about it later, what's more). (various references)

Dutch

erop (for this, on it, untranslated). (various references)

Finnish

siitä (from it). (various references)

French

arrête (don't go on about it). (various references)

German

verdusseln (forget all about it), nun mach dir mal keinen (no need to get uptight about it), mir ist nicht wohl dabei (i'm uneasy about it), ich zweifle daran (I'm in doubt about it), ich weiß nichts davon (I don't know anything about it), ich weiß kein Wort davon (I don't know a thing about it), ich weiß davon (I know about it), ich habe es vergessen (I forgot about it), ich bin darauf gespannt (I'm corious about it, I'm curious about it), ich bin darüber nicht erfreut (I don't feel happy about it), es tut ihm sehr leid (he feels very bad about it), er schämt sich kein bisschen (he is quite unblushing about it), das wär's (that's about it), darüber besteht kein Zweifel (there's no question about it). (various references)

Greek 

θα γελάσεις γιά αυτό αργότερα (you will laugh about it later), θα του μιλήσω γιά αυτό (I will speak to him about it). (various references)

Hungarian

körülbelül így van (it's just about it), körülbelül így is van (it's just about it), kár a szót vesztegetni rá (no good talking about it). (various references)

Irish

faoi (under). (various references)

Italian

ne (of it, of them). (various references)

Japanese Kanji 

考えてみれば (if you think about it). (various references)

Japanese Katakana 

かんがえてみれば (if you think about it). (various references)

Pig Latin

aboutay itay.(various references)

Portuguese

por favor pense nisto (please think about it). (various references)

Romanian

absolut (there's no doubt about it), sã nu-ţi pese de asta (don't bother about it), nu-mi pasã câtuşi de puţin (I don't care a cent, I don't give a hoot about it), nu te supãrã pentru asta (don't get vexed about it), mai e vorbã (there's no doubt about it), las-o baltã (forget about it), laş acesta în voia dumitale (you may please yourself about it), garantat (certified, guaranteed, there's no doubt about it, warranted). (various references)

Russian 

это неизбежно (no two ways about it), об этом не может быть двух мнений (no two ways about it). (various references)

Serbo-Croatian

nemati dlaku na jeziku (make no bones about, make no bones about it). (various references)