As a newbie, it is important that ypu identify yourself with your local board, because it will enable you to learn in your local language which might help you understand topics being discussed in the forum faster, and it will also make you grow faster, especially those people that English Language is their second language. Local board will make you also have good contact and have new friends from your country because, life doesn't end here in bitcointalk, since nobody knows tomorrow.
For someone who is ready to explore the forum themselves without being told a local board exist will definitely find out there are sections for that, but it should be noted that participating in them is by choice, you can always maintain being on the English boards, but those having strong issues from comprehending English language should find it more suitable for them to express themselves in the language they best understand, bitcoin is for everyone and language should not be a barrier for anyone to learn about it.