Most translations is working, but for example "welcome screen" looks like this:

but all others screens are ok, and font is ok!
But still on the last screen I have all in English... or when everything is installed correctly and there is question about restart, then I have again question marks instead of Russian words.

all in english...

I've downloaded new translations from translations subforum and replaced old files.
.nsh file inside UltraModernUI looks ok

both .nsh and .nlf files in .\Contrib\Language files\ are ok also
all files are in UTF-8 w/o BOM. And everything looks ok but not first and last page.
I even tried to manually !define MUI_TEXT_WELCOME_INFO_TEXT inside my installer but it doesn't work either.