Donaudampfschiffahrtselektrizitätenhauptbetriebswerkbauunterbeamtengesellschaft
Donaudampfschiffahrtselektrizitätenhauptbetriebswerkbauunterbeamtengesellschaft is a compound word that serves as an example of the virtually unlimited compounding of nouns that is possible in many Germanic languages. According to the 1996 "Guinness Book of World Records", it is the longest word published in the German language.
Plautdietsch language
The most problematic words are those with an -e plural ending in German. Although the entire class with no ending is made out of them, many other words are treated differently. For example, the plurals for Stool and Stock (chair and stick) are Steela and Stakja (compare German Stuhl, Stühle; Stock, Stöcke). Since they have their vowels fronted there seems to be no reason for the -a ending. Many others have been moved into the -en class: Jeboot, Jebooten (commandment/s, German: Gebot, Gebote). With some not so common words, there is no certainty about the correct plural, different speakers create them in different ways: the plural of Jesaz (law) could be Jesaza or Jesazen (German: Gesetz, Gesetze).