 He claimed that speakers of "Atlantic" (Semitic or Semitidic) founded coastal colonies from the 5th millennium BC.Thus, "Atlantic" influenced the lexicon and the structure of Germanic and the structure of Insular Celtic.According to Vennemann, migrating Indo-European-speakers encountered non-Indo-European-speakers in Northern Europe, who had already named rivers, mountains and settlements in a language that he called "Vasconic".