butterandflyB

Problem:
I have a category page called Portfolio in English language. I've translated the category to the slug portfolio-pt, but if I go tho the Menu and choose in Portuguese and then click in portfolio (PT) it goes back to portfolio in English.
Solution:
I checked that this issue was being caused due to this Yoast setting being disabled:

Yoast -> Settings -> Categories -> Additional settings -> Show the categories prefix in the slug

To fix it I went to WPML -> Settings -> Taxonomies Translation -> Categories (category) -> Set different slugs in different languages for Categories and removed the Portuguese translation in there.

Relevant Documentation:

I followed this errata for that: https://wpml.org/errata/yoast-seo-stripping-category-base-not-working-when-the-taxonomy-slug-has-been-translated/