As someone who kearned a bit of German first... Swedish nouns give the HARDEST time. Like, Hunden is German for "dogs", but Swedish for "The dog". I'm sure I'll get it eventually, but it's suuuuch a headache to get past!
It depends on what you wrote. tjejer is an accepted answer, but not a 'best' answer, so it shouldn't be shown spontaneously. However, if you happened to write something that was similar to it, you could get shown that option.