This is the 846th most frequent Polish word.
wersji
"Versions" (genitive or locative singular form of "wersja").
In this sentence, 'wersji' is in the genitive plural case, referring to different variations or editions of the book.
Ta książka ma wiele różnych wersji.
This book has many different versions.
Here, 'wersji' is in the accusative singular case, referring to the specific English translation or adaptation of the movie.
Czy mogę zobaczyć wersję angielską tego filmu?
Can I see the English version of this movie?
In this instance, 'wersji' is in the genitive singular case, conveying the concept of an optimal form or iteration of each project.