Survey language not changing in published version?

Hi everyone!
I have an English survey translated to Portuguese.
When I "Preview" or "Print" the survey, changing the language on the drop-down menu actually changes the language of the survey.
However, when accessing the survey through the distribution link (once its published), changing the language in the drop-down menu has no effect whatsoever. I am pretty sure I am doing it right, since the "Preview" version allows me to change the language.
The "Powered by Qualtrics" does change to Portuguese when I choose it from the drop-down menu.
I have tried searching on Google and on this forum for this issue but did not find anything.