I have added some windows font in Pro/E WF4.
i.e. calibri font,
I am able to change font to calibri but the aspect ratio is not getting changed, also it is not accepting space in the line.
Calibri is a true type font(TTF). True type fonts does not allow to change the width factor (aspect ratio).
On the other hand you should be able to use the space. I don't have any explanation on this issue.