Japan Language Font issue

Hi i have developed an Embedded Application in QNX OS with Photon GUI Buider.

My Application is working fine with the English Font as predefinded given in the Photon GUI.

I got the translation strings for the Japanese and i generated the JApanese Language data base file using Photon GUI.

Now my application is working fine in the Japanese Language. But my problem here is,

" For Some instances the Japanese Fonts getting “BOLD” and after some time it is in Normal Font level.

My Question is

"1. Why in such instances it is getting BOLD. For english it is not like that it is uniform in all the cases.

Please amyone help me in this isssue.