However, I am sympathetic to those arguing translation. Sometimes I'll visit Japanese or Chinese websites. With some frequency, even if most of the site has an English edition, I'll find some UI element not translated, including buttons and the like... OK I think it was the commenter that I responded to, in a different reply said... just Google it if it's a single word. Great! But I don't even know where to begin to get the right characters from my old fashioned US keyboard. So now I have to Google for how to use my keyboard to get the characters I want, which also may need pre-requisite knowledge of the language I'm trying to translate (radicals and all that jazz)... that's a heavier lift than may be anticipated and where a simple copy/paste into an appropriate translator would make things much, much easier.

I would suggest this: make everything buttons, links, tabs, etc. selectable and copyable unless there is a real explicit and compelling reason to do otherwise. Now to be fair, I'm old enough to have been "online" in some fashion or another since before general public internet access availability was a thing... so my expectations for butter-like user experiences are low and my desire to do any damn thing I want high... but even today, there are probably still more websites which don't stop you from copying anything than there are searching for that polished experience where only the right things can be selected. The discontinuity and the deviation from the expectation that I can copy anything I also find as something which diminishes the user experience, even if occasionally I'm annoyed by over selecting things.