I assume you meant to write "XTF" (where X=T or O) not "XFT" then.
Although even then, using XTF as an abbreviation for TTF/OTF is highly nonstandard. Those four extra characters greatly increase the likelihood that you'll be understood
XFT it's the tecnology from X11 which allows antialiased fonts among FreeType. Add that support and you'll magically have proper fonts (and full Unicode ones) instead of the old, aliased, locale bound ones.
> Add XFT support and this language would be cool to have a fast RAD development with easy crosscompilation.
Xft only works on X11, whereas "easy crosscompilation" suggests an interest in supporting multiple platforms, which normally includes platforms that don't use X11 (macOS, iOS, Android, Windows, even Linux with Wayland)
Although even then, using XTF as an abbreviation for TTF/OTF is highly nonstandard. Those four extra characters greatly increase the likelihood that you'll be understood