How to work with files in the OS X SVN client whose names contain the characters é, è, etc.?

Question

subversion

Moved from under Windows to hackintosh, faced such a problem.
In all clients, such files are not processed properly and this is what happens:
Screenshot from cornerstone

That is, such files are repeated in the list, one of them is marked as unversioned, the second is missing, but in fact there is only one file and it exists.
Screenshot from versions

Is it possible to work with them somehow without adding them to ignore? I'm sure there is a solution, after all, people somehow work on OS X.