Thank you @Nprod.

Cleaned typo in language_test.h Cyrillic part.

Automatic selection was to unflexible.

Updated documentation

Updated language files to new logic and documentation.

Updated bdf2u8g.exe

Fonts have been created with fony.exe (http://hukka.ncn.fi/?fony)

The HD44760_? fonts simulate the fonts of the character based displays.
The ISO10646 fonts provide the right size of the standard fonts.
Marlin_symbols contains only the the special symbols of the original marlin font.