In spanish questions intonation changes occur only on the last word(s), not the whole sentence. I'm not a linguistic, but I think it's so you can be sure a sentence is a question from the start.
When reading english sometimes I assume a sentence is an affirmation until I see the question mark, and then I have to reinterpret the sentence. I wonder how it is for native english speakers. Do they assume nothing until the sentence is finished?
You are indeed right, my explanation was poor. But for other languages it is very common to get surprised at the end of sentences, yes.
(Latin American fellow) At first I thought this was an Australia-style joke, because there are Spanish speaking countries in both hemispheres. Yep, I can overthink stuff and still be an idiot lol