Bug in Trade Market with Brazilian Portuguese Language Setting

I've run into a really frustrating bug in the trade market when playing with the game set to Brazilian Portuguese. Sometimes everything works as expected, but other times - seemingly at random - parts of the interface appear in Portuguese while others show up in English.

The worst part is that when this happens, I can't search for some items by name (error: "An argument was invalid"), regardless of whether I try in English or Portuguese.

Could you please look into this issue? Thanks a lot.