"of talking in foreign language" - speaking foreign....
"an arrival abroad is a good way to get more and more language skills" - living abroad,
"The majority of students came back home and speak fluently" - come,
"...studying abroad is as a new experience..." - bez 'as',
"They certainly meet a lot of people"- po co to 'certainly' w tym zdaniu ?
"Relationships are very needed for young adults" dziwnie to brzmi w ogóle,
"other peaces of the world" - places,
"The polish prices and salaries are different than in for example the western Europe" ja bym 'the' wywaliła z tego zdania,
"It caused that a lot of people don’t have enough money for the living there" - a lot of sudents from Poland can not afford studies in western Europe,
"studying abroad and in Poland has got the better and worse sides" there are advantages and disadvantages (pluses and minuses) of studying abroad and studing in Poland,
"we have the great universities" znowu to the