In the movie Age of Ultron, they just used Serbian as a stand-in for the Sokovian language. But for Wandavision, someone (possibly dialect coach Courtney Young? it's not clear) created a conlang to represent Sokovian. The only official written sample we have is this (which is in IPA, not orthography):
(There's a small amount of other Sokovian dialog in the show, but it hasn't been transcribed or subtitled.)We’ve been waiting for you
'tie mi t͡ʃaˈjaɫəm
Now you are here
ˈʃiɪdeŋ ˈti e ˈʃte
More perfect than I imagined
ˈdrage wo t͡sto ˈmisliɫəm
Our house is now a home (our house is now a nest)
ˈdom naʃ ˈʃiɪdeŋ ˈgnieʒdo
No matter where you go
bez veˈdeɪ̆ doˈkude ˈjit͡ʃiʃ
Sunlight shines on you
ˈʃiʒa ˈsunt͡so nad tiˈe
Could someone who knows Slavic languages tell us: what is this based on? what is it closest to? where it would fit in the tree (if anywhere)? does it make sense grammatically? is it just gibberish?