I believe the idea of the local board is to bring people from the same locality together, to discuss important topics like cryptocurrency, blockchain, wallet security, national issues etc. The local board gives members who cannot make contributions in the english board because of their inability to understand english language the opportunity to participate in most of the things that are been discussed on the on the forum at the local level. It is not compulsory to post on your local board. There are persons that are not fluent in their local language because they were born abroad and as such cannot interact with persons in their local board. So they stay clear off the local board while some might have other reasons.