The first map shows all the city names in Germany ending with "bach":

The second one is similar to the first one, but in addition, the green dots are showing city names ending with "beck":

This map shows all cities ending with "ingen" (like "Reutlingen", "T├╝bingen") versus cities ending with "ing" ("Garching"). In the south of Germany, its a clear differentiation between Baden W├╝rtemberg ("ingen") and Bavaria ("ing"):

"holm" over (nothern) Europe:

"itz" in the eastern part of Germany, Switzerland and Austria: