Say, what? When hasn't Duolingo been broken?

But I'm sorry to say that I might be of little help when it comes to plurals. I mean, sheesh, I've just discovered that, indeed, the plural of Mädchen matches its singular form (I don't know why, I don't think I've ever seen or heard it used in the plural... or maybe just haven't paid attention).

I don't know which two classes they mean. So far I've kind of had to learn plurals by heart pretty much for each noun (barring some exceptions with common endings, like -ung). Like, there's nouns that stay the same, change a vowel, add -en, add -er... Which of those make up which class, I wonder.

But yeah, apparently neuter nouns ending in -chen stay the same. So das Mädchen - "the girl", die Mädchen - "the girls".

Better get used to nouns staying the same. There's a lot of them, ending in -er, especially for professions. A broad sampling: https://en.wiktionary.org/wiki/Categ...fixed_with_-er .

Also, for pronunciation, don't forget https://forvo.com/. I'm sure I've already mentioned it here, but I suppose it got lost in the regular stream of links. It's a site where volunteers records their pronunciation of words and sentences. I've used it for Welsh, which means their database must be extensive indeed.