3 ms·
https://en.wikipedia.org/wiki/Uerdingen_line https://en.wikipedia.org/wiki/Uerdingen_line https://en.wikipedia.org/wiki/Benrath_line https://en.wikipedia.org/w
by deltron3030 8y ago
https://en.wikipedia.org/wiki/Uerdingen_line https://en.wikipedia.org/wiki/Uerdingen_line
https://en.wikipedia.org/wiki/Benrath_line https://en.wikipedia.org/wiki/Benrath_line
Seems related, those isoglosses stretch from Belgium to Poland.