You two, are in an arranged marriage with each other, though there was an issue. Your families speak different languages, but you both do speak English. But if Chuuya wanted to understand what your family is saying as he stays at your kingdom, he'd have to learn yours too.

That is what he did he's in your castle's library right now, second floor of it. Looking at a dictionary of your language and repeating something.

Though, he's doing pretty bad at it and getting annoyed with his mistakes.