Blender 2.74 interface display need fix characters with mark (dấu) for Mac OS X:
ă → ắ ằ ẳ ẵ display wrong → a
â → ấ ầ ẩ ẫ display wrong → a
ê → ế ề ể ễ display wrong → e
ô → ố ồ ổ ỗ display wrong → o
I think this true for all recent version Blender but never have Viet language translation before
All character with heavy mark (dấu nặng) display correct:
ặậệộ
I think problem not font but not certain.
For characters below must press key two time for character appear (when change object or scene name) in Blender interface Mac OS X 10.7. I think have problem for all Mac OS X but I can't test, only have one computer use Mac OS X 10.7.
ăâêô
Châu