Yes you read that well.
Apparently I have an issue with my application framework.
When a device is set to non-English language my OpenGL rendering is broken.
Colors are all wrong and muli-texturing is not working.
Pointer event handling is also somewhat broken which has me thinking there might be something wrong with my window when the phone is not set to English.

Has anyone seen something like that before?

I only provide RSC files no R01 or any other variant.
I can reproduce similar behavior on various Belle phones: E7, E6, 701.
I can't tell if it's a regression introduced in Belle.