When I try to upload a file under the name "Ru-у.ogg" ("у" is in cyryllic, not in latin alphabet) to Wikimedia Commons, I get a message:
Permissions Errors
You do not have permission to do that, for the following reason:
The name of the file you are uploading begins with PICT, DSC, image, ..., which is a non-descriptive name typically assigned automatically by digital cameras. Please choose a more descriptive name for your file.
Version: unspecified
Severity: normal