This is (ab)using unicode, for example the F is actually a Mathematical Bold Fraktur Capital F: https://www.compart.com/en/unicode/U+1D571 This is terrible for screen readers and the like which are unable to read or understand these unicode characters making accessibility a real concern.
I wonder actually. Google seems to understand these, you can search with them. I wouldn't be surprised if screen readers understand these symbols. They're originally for Mathematics, and I'm sure there's plenty of blind mathematicians.
https://news.ycombinator.com/item?id=17752680
unicode normalisation: http://unicode.org/reports/tr15/
Nobody in that thread tried it on an actual screen reader then, either. Someone did mention that iOS got well confused by it, so there's one data point.