I saw that now we can use the windows fonts (LyX 2.0) selecting them in a drop down menu after tick No tex typography. My problem is that when i do that I always get an LyX error saying:
\char_make_active:n {"20}% The control sequence at the end of the top line of your error message was never \def'ed. If you have misspelled it (e.g., `\hobx'), type `I' and the correct spelling (e.g., `I\hbox'). Otherwise just continue, and I'll forget about whatever was undefined. I don't know why is this happening... I really apprecciate your help! ;-)