I only say about source code format, but not internal presentation strings!

zorran wrote:
> Russian language not working
> in comments and strings by default
> with ANSI coding (code page)
> 
> Compiler write error - "invalid UTF-8 sequence"

D source code is expected to be in Unicode format (like UTF-8). Modern editors can be set to generate this format instead of using code pages.

Having the source code in Unicode ensures global portability of the source code. If the code is written in one code page, then compiled or displayed with a different code page, the result is garbage.