find: locale affects results incorrectly

[sunnycemetery]

... possibly.  Please see for yourself:

> ■ LC_ALL=C ls -l
> total 1
> -rw-r--r-- 1 userx userx 0 Aug 7 08:35  
> ''$'\325\253\302\265\366''+'$'\325\361\275\322\374\253\322\342\203\322\351''+'$'\322\351\245\322\342\304\264''+'$'\364''rd'$'\264''+'$'\342''07.srt'
> ■ echo $LANG
> ja_JP.utf8
> ■ find -name '*.srt'
> ■ LC_ALL=C find -name '*.srt'
> ./?????+???????????+???????+?rd?+?07.srt

I have attached logs of the following debug command for either locale,  
with ‘ and ’ replaced with ' for quick diff comparison.  Debug output  
does not elucidate much, but perhaps someone can shed light on how such  
a seemingly simple search could possibly fail (or even be affected by  
locale in the first place).

> find -D all -name '*.srt'

C
Description: Text document

ja_JP.utf8
Description: Text document