I agree - fixed
I am not a native English speaker but:
in level 42 there is:
engelsk - English
sometimes I got the multiple choice answer āenglishā which was marked wrong. Actually I think this word doesnāt even exist in English. Maybe you can check the database where this extra āenglishā comes from and fix it. Maybe āengelskā is in there twice?
In level 15, I believe āwithoutā should be āutenā, not āuten atā. Thank you!
Level 32 and 34 have the word-count mismatch problem.
In level 13, āen bukseā has the alternative āei buskeā. This should read āei bukseā.
Level 34, 46 and 56 have the word-count mismatch bug.
Also in level 56:
solbriller - sun-glasses
The audio says āen solbrillerā. Can you adjust that? Itās confusing.
Word count mismatch bug level 25, 27.
Hi. In Level 28, for āen adresseā, āei adresseā was not accepted for me.
Is en adresse a feminine word? I checked both of my Norwegian textbooks as well as a couple of online dictionaries and they all listed adresse as en.
Well that is interesting. Because I just searched a bit and found only references which list it with āei/enā.
I looked at these three until now:
āei dameā is also not accepted.
same issue with āen/ei prinsesseā and āen/ei frueā 
I noticed a minor typo in Level 72 Science: the translations of āsuperficialā seems to be āoverfladiskā, not āoverflatiskā. Nothing really serious, but still worth correcting.
From what Iām seeing in my primary dictionary, both spellings are acceptable. Iāve set up the word to allow either spelling for now.
superficial adj
1. (views etc.) overflatisk
2. (on the surface) overflatisk, overfladisk
All three are fixed now.
Iām finding this listed as a feminine word as well (dict.com). So, at least for now, Iāve added āei adresseā as an accepted alternative.
Level 64:
et instrument - an instrument
sound says āen instrumentā. Very confusing can you please check that?
Level 9: Verbs: Present 1
to speak - Ć„ snakke
the conjugated āsnakkerā is not accepted as it is for (all?) other verbs
Iām not sure what level āĆ„ snakkeā is a part of, but itās not a part of the āVerbs: Present 1ā level (currently #9). (Memrise doesnāt give us a good way to find what level, or levels, a word is in other than opening and searching each level individually, one at a time.)
In general, it takes extra effort to add alternative allowable spellings, in this case conjugated verb forms. So with hundreds of verbs in the course, we chose to only include the conjugated form of present tense forms of verbs in the āVerbs: Present 1ā level. For all other levels, our intention is to allow just the base/inifintive form of the verb (with or without the āĆ„ā).
Hopefully that makes sense and doesnāt hinder the learning process to much. Maybe as time goes on weāll have the bandwidth to do more with the various conjugations of every verb (including past and participle forms). But for now, weāre still trying to get 100% coverage with the vocabulary in the Duolingo course (weāre probably about 90% of the way there now) as a higher priority.
-Eric
Iāve removed the sound for this for the moment. Given that these sounds are from a native speaker, Iām now questioning weather āinstrumentā is a masculine (en) or a neuter (et) noun. I canāt find any definitive answer at the moment though.
Let me know if you find any convincing evidence one way or another.