It's using the <switch> tag for this

https://developer.mozilla.org/en-US/docs/Web/SVG/Reference/E...

However, like with many of these obscure features, I am not so sure it works well in practice. I have the Windows 11 laptop I'm viewing that SVG from set with support enabled for english, french and russian, and I'm getting, among most of the English tags, a few stray "Psychique" and "Привидение" types in the svg. I have no idea how it chooses which one to show, there.