Support Russian language

Hello, I have a problem with file with russian language, look at this photo:
I just create a funny erro 404, but I have this problem. Please, can you make support for Russian language files?

I’m idiot, sorry.
I found solve of this problem:
1.Download NotePad++
2.Edit your file with NotePad++
3.Convert to UTF-8.
And we can see result: