European languages are members of the same family. The languages only differ in their grammar, their pronu nciation and their most common words. pronunciation and more common words. If several languages coalesce.  over the years, sometimes by accident, sometimes on purpose. Over the years, sometimes by accident, sometimes on purpose. European languages are members of the same family. The languages only differ in their grammar, their pronu nciation and their most common words. pronunciation and more common words. If several languages coalesce.