According to the Marvel wiki, in AOU the signs in Sokovia are written in Serbian Cyrillic, so I'm going with the twins' first language being Serbian or an extremely similar dialect. The mun, however, speaks no Serbian whatsoever so I will be relying on Google Translate for the sporadic occasions when Pietro says something in Serbian. If I get something wrong please forgive me!

 'Sup guys here's my How's My Driving post. I would love any feedback. On one hand I am constantly worried about how I'm playing him because Pietro is in many ways completely opposite to me but on the other hand I'm like 'yes I finally have a little shit to play let's do this' and may go a little overboard.