Yeah, I removed the "glyphs" thing from my comment, because I realized they were SVG backgrounds, not actually text, but that is a common place to use user-select: none, on elements with font faces that are symbols.
I am curious what operating system you can select text from the buttons on though. I might spin up browserstack to experiment.
Yeah, I just tried to select text in the button element and translate it specifically or copy it, and it doesn't work. You can highlight it, but you aren't selecting the text.
This is what is copied from the login page, you can see that the button text is missing:
I am curious what operating system you can select text from the buttons on though. I might spin up browserstack to experiment.