So I got the Spanish translation of "Harry Potter" and started reading, and sure enough, I didn't understand almost anything at the beginning, but I kept on reading because I loved the book, and by the end of the book, I was able to follow it almost without any problems.
Vaig agafar Harry Potter en castellà i vaig començar a llegir. Al principi, quasi no entenia res, però vaig seguir llegint, perquè m'encantava i al final, el podia entendre quasi tot, sense problema.