Hi,

 Perhaps, the main issue is that there's no global policy over the real names, here. Some are exact and some are in "Latin equivalent", as you put it. I would rather be exact, but I guess this can render the search difficult. Mainly because I believe users will search with Latin equivalent instead of exact strings.
 I'll have to think about this.

 In the meantime, can you perhaps point me to the most obvious cases ?

Fixing the characters surely wouldn't grossly improve "searchability", but it wouldn't make it worse either, with the gain of having the names properly spelt (they really look odd to a native speaker).

Not sure what the most obvious cases would be as they're all equally obvious to me. So maybe I'll just provide a representative sample:

Adam Trëdowski - > Adam Trędowski
Paweî Bogdaïski -> Paweł Bogdański
Rafaî Hencel -> Rafał Hencel
Îukasz Siedlecki -> Łukasz Siedlecki
Sîawomir Giergielewicz -> Sławomir Giergielewicz
Damian Bâczek -> Damian Bączek
Michaî Ôlusarczyk -> Michał Ślusarczyk
Piotr Leônikowski -> Piotr Leśnikowski
Rafal Lipiñski -> Rafał Lipiński (first name latinized)
Michaî Kozusznik -> Michał Kożusznik (last name latinized)
Ãukasz Kaluski -> Łukasz Kaluski (last name probably latinized)
Michaî Slusarczyk -> Michał Slusarczyk (last name most likely latinized)
Tomasz Ûoînierzczyk -> Tomasz Żołnierzczyk (last name most likely misspellt besides wrong chars)