Words appearing as "new words" when already learned.
I've been following the Swedish course but I keep finding that certain words are highlighted in gold as new words, but I've learned and used them many, many times already!
For example "är", which is just the word for "is/are". It's a common word that was introduced in lesson one but will quite often appear as a "new word". Have I done someone wrong or is this just a bug?
Also for some bizarre reason also the word "häst", for "horse"! :)
Not exactly a Duolingo breaking bug, but one that I keep noticing.