it's worse when you do speak the language, but your laziness in one language affects the other: in spanish, if you leave out the punctuation like it's english, you could accidentally end up texting people that your potato is into anal gangbangs instead of into how much your dad likes new years parties. lol
mi papa disfruta fiestas por ano neuvo (my potato likes new anal gangbangs)
vs
mi papá disfruta fiestas por año nuevo (my father likes new years parties)
To be fair, ñ in Spanish is a whole letter by itself and not just a funny n. As in, it has its own entry in the alphabet, and it has a dedicated key on the keyboard. So even lazy people don't write n instead :P