I am one of the founders and coaches here at Scientific Writing Coach. I am currently a researcher at Stanford University, US. I obtained my PhD from Uppsala University, Sweden and I have a Certificate of Proficiency in English from Cambridge University, UK.
It is important to know the differences between British and Amercian English. Although native speakers rarely need to think about questions like this, non-native speakers do. Whenever you need to write something in English you should always decide if you want to write British (UK) or American (US) English.