olivir Yes it can with the specific icon in the adress bar.
I probably should have known that, but as I said, I have very little need to ever translate anything but someone's question here in the forum. That icon isn't displayed, of course, unless there's something that needs translation, so I'd never noticed it.
I found out that if you go to the Vivaldi settings, and type translate into the search textbox, you get a full-page education on the subject. E.g., there are keyboard shortcuts for translating a tab, a view, or a page.
