There are in this extension, Dictionaries for Latin (a dead language), Mongolian, Welch, Portugal Pt ...
But not Brazilian Portuguese 😢... Ok then 👍🔟😂

simple but good add

I'd rate it lower if I could. Absolute unmitigated trash compared to the predecessor.

I use it as a generic English dictionary and it works better then other extensions I've tried

For anyone on zen browser having trouble installing dictionaries, you need to be in a workspace that doesn't have a default container before opening the extension settings!