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.