>>1218038As you get further in, it seems to throw more vocabulary at you. Pochi's learned new words in her streams atleast. But the act of refreshing yourself is in itself learning. It's called repetition and is pretty key to learning a language. Imagine trying to speak english if you had to spent 5 seconds trying remember the word for "that". You need to pound the basics into yourself thoroughly over many years so you can whip them out instantly.
Duolingo however has a pretty big problem in that it doesn't really explain grammar points at all, so you're just going to end up speaking a broken pidgin form of english unless you go actually go through a grammar textbook.