The Uerdingen Line (named after Uerdingen by Georg Wenker) is the isogloss within West Germanic languages that separates dialects which preserve the -k sound at the end of a word (north of the line) from dialects in which the word final -k has changed to word final -ch (IPA ) (south of the line). An example is the first person singular pronoun (I in English): north of the line, this word is ik, while south of the line the word is ich. This sound shift is the one that progressed the farthest north among the consonant shifts that characterize High German and Middle German dialects. The line passes through Belgium, the Netherlands, and Germany.