10 Behind The Scenes Reasons For MCU Characters' Quirks
3. Bucky Speaking Romanian
Bucky's (Sebastian Stan) first appearance in Captain America: Civil War sees him surface in Bucharest, Romania, where he's been lying low but soon enough attracts some unwanted attention.
We briefly see Bucky in the market buying some plums and speaking Romanian. You may simply assume that Bucky picked up some conversational Romanian while living in the country - or that his Winter Soldier indoctrination gave him a perfect understanding of it - but the Russo brothers actually decided to show off Bucky's surprise fluency for one special reason.
As it turns out, Sebastian Stan is himself a Romanian-American actor, having been born in Constanța, Romania and living in the country until he was eight years old.
As such the actor grew up with Romanian as his native tongue, and still has a strong grasp of it to this very day, which was fittingly put to good use in this little scene where he asks about the ripeness of some plums he wants to buy.