Very cool, if true

The best thing about the wug test is that it shows that the regular plural in German is the same as in English, add an s on the end: das Wug/die Wugs. But only about 2% of German nouns (mostly recent imports from other languages) actually take the regular plural, and several of the irregular forms are commoner. https://www.academia.edu/7742188/German_Noun_Plurals_A_Challenge_to_the_Dual-Mechanism_Model