KEEP ONE'S TEMPER

Albanian

e zotëroj veten. (various references)

Arabic 

‏حافظ على هدوء أعصابه. (various references)

Bulgarian 

въздържам се (desist, forgone, restrain oneself), запазвам спокойствие. (various references)

Czech

ovládnout se. (various references)

Finnish

säilyttää malttinsa (control oneself, retain one's composure). (various references)

Greek 

κρατώ την ψυχραιμία, συγκρατούμαι (keep from doing). (various references)

Hebrew 

לשלוט ברוחו (control oneself). (various references)

Hungarian

megõrzi a nyugalmát (keep one's head). (various references)

Italian

restare calmo. (various references)

Pig Latin

eepkay one'say empertay.(various references)

Romanian

se stãpâni (contain, contain oneself, control oneself, man oneself, possess, possess oneself, rally), nu se înfuria, a-şi pãstra stãpânirea de sine, a-şi pãstra sângele rece (balance, retain one's composure), a-şi pãstra calmul (keep cool, retain). (various references)

Russian 

владеть собой. (various references)

Serbo-Croatian

kontrolisati se (control oneself). (various references)

Spanish

contenerse (contain, forbear, hold back, hold in, pull up, restrain oneself). (various references)

Swedish

behålla fattningen (keep one's countenance). (various references)

Turkish

sinirine hakim olmak, sakin olmak (calm down, keep cool, keep still). (various references)

Ukrainian

стримуватися (abstain, contain, control oneself, hold in, pull up, refrain), володіти собою (control oneself, possess oneself of). (various references)