Mine is people who separate words when they write. I'm Norwegian, and we can string together words indefinetly to make a new word. The never ending word may not make any sense, but it is gramatically correct
Still, people write words the wrong way by separating them.
Examples:
"Ananas ringer" means "the pineapple is calling" when written the wrong way. The correct way is "ananasringer" and it means "pineapple rings" (from a tin).
"Prinsesse pult i vinkel" means "a princess fucked at an angle". The correct way to write it is "prinsessepult i vinkel", and it means "an angeled princess desk" (a desk for children, obviously)
"Koke bøker" means "to cook books". The correct way is "kokebøker" and means "cookbooks"
Hebrew. I hate how everything is gendered. You cant communicate with a person without assuming his/her gender. You cant ask "how are you?" or "what is your name?" without using the other person's gender. Its worse than spanish/italian. We have genders for verbs, our "you" is gendered, heck, NUMBERS have genders (two girls, two boys - you use a different word for two).
Have you ever spoken to a person and werent sure about their gender? In hebrew you would be screwed.