Please see issue here: for bada platform ( http://www.cocos2d-x.org/boards/15/topics/9467 )
The same issue is occurring on android platform.
I will quote his text as the issue is exactly the same:
I have noticed that from cocos2d-x_12 when we set some ttf font resource (like arial.ttf )it doesn’t set at all. Its seems this functionality is not working in this build. Even in the “Label Test” in TestCocos2dx sample where ever .ttf fonts are used they aren’t working.
I am working on a project for a client, in which rendering a specific font is imperative.
It is not an option to display a device font, as this font is related to their branding.
This issue is still present, including in ’FontTest", this is still an issue