If the board is spam, it will be muted, locked. Locals can continue their spamming before the board is locked.
Use report to report spam posts because it's responsibility of local members who ask for the local board.
The board is in English and global moderators, current moderators who can use English can moderate it. All moderators in Bitcointalk can use English well and all of them can do this.
What are you saying mate, I don't think you have surf the naija local board because if you have then you would know that the board is one of the most promising in terms of quality posters and more over there are lots of other board in which lots of spamming and abuse of merit is going, where someone is showered lots of merit for a shit post of just saying a welcome or introduction message. If you do browse other local board then you will be surprised to what you would see but that being said , this thread is for request of child board and moderator just like every other local board has and I think you should stick to it and again not everyone speak and pass information in the local board in fluent English as I believe you will be familiar with what is called pidgin English or "broken English" as we call it here.