Original sentence: The characteristics of the Albanian dialects Tosk and Geg in the treatment of the native and loanwords from other languages, have lead to the conclusion that the dialectal split preceded the Slavic migration to the Balkans which means that in that period Albanians were occupying pretty much the same area which straddled the Jirecek line
Edited sentence: The characteristics of the Albanian dialects Tosk and Geg in the treatment of the native and loanwords from other languages, have lead to the conclusion that the dialectal split preceded Slavic invasion of the Balkans which means that in that period Albanians were occupying pretty much the same area which straddled the Jirecek line