Original sentence: Formerly it is also defined as a dialect of Polish; one of Silesian dialects – the Lach dialect – is also sometimes defined as a dialect of the Czech language.Silesian or Upper Silesian (Silesian: Ślůnsko godka, , ) is an ethnic Slavic language spoken in the region of Silesia
Edited sentence: Formerly it was also defined as a dialect of Polish; one of Silesian dialects – the Lach dialect – is also sometimes defined as a dialect of the Czech language.Silesian or Upper Silesian (Silesian: Ślůnsko godka, , ) is a Slavic language spoken in the region of Silesia