i am fascinated by how english native speakers confuse you're with your but non native dont usually have problems.
in spanish is normal to change the prounouns (le la los la) grammar rules depending of the region of spain making talking with people a little confusing https://en.wikipedia.org/wiki/Le%C3%ADsmo
I don't know if it's interesting, but explaining English language prepositions to non-native speakers is challenging. It's one of the harder things with mastering the language.