Talking about purpose, the reason why I am writing in English, because I am not so good in English, so far as I know writing, reading and talking can improve that. However I believes emotion can be more successful reveal when you used your native language, the language that you are excellent in expressing your emotions . Is it right? Actually I've done research about it too! Therefore, in future my blog will be in English and Bahasa.
Casual or Formal? I'll think about it later..
Thanks for the support