No, it is not blatant "North American and Western European bias".

I am Bulgarian, living in Bulgaria, a small country in Eastern Europe. My native language is Bulgarian. I also know English, Russian, and a little bit of French and Turkish.

I do not want to write, or read source code written in Bulgarian, or Russian or French, or Kiswahili, or Japanese etc. I want to use one single language for that. It currently happens to be English for historical reasons.

Supporting unicode in source code, will lead to language fragmentation, and will limit my ability to participate, and to understand everything already build by others.