Does iw.cfg can use multi-byte

System

How to use multi-byte at iw.cfg ?
For example,
CSS1 is ok.
But CSS2 is not ok.

[iwproxy_remap]
CSS1=/main/test
CSS2=/main/´ú¸Õ
global_default_map=/

[CSS1]
_docroot=/
/about/=/

[CSS2]
_docroot=/
/css/=/