Collation support?

Is your feature request related to a problem? Please describe. I've looked up on tantivy' repo and this one but did not find any doc related to the support of other languages (I think for now it's just plain english?)

Describe the solution you'd like A support for other "collation" for example searching for "Remi" in french should catch "Rémi" as well. A search of "fuß" in german should catch "fuss" as well (not a real word, my german is a bit rusty 😅 )

Please let me know if I missed something in the doc. And thanks for this piece of software ❤️