luismi Hi
I think you've not configured multilingual site properly yet. You should create Menu/Modules/Template styles/etc ... for each language.
For example, you assigned ja_colab - Home style for both homepage of EN and PT. However, this template style loaded the same menu (which is also not configured properly).
I just duplicated this template style + clone the Navigation profile to have a new one and load the Menu for EN and you can see it's showing correctly now.
I recommend you to create separate menus for EN and PT, then do the same for Menu module assigned to off-canvas position.
Pls check out this documentation for more info: https://www.joomlart.com/documentation/t4-framework/multilingual-configurations