Persian speaking community from Iran, Afghanistan and Tajikistan and other countries are strength enough to have a separate sub-board on bitcointalk forum.
Not really, according to the numbers in your
local thread. Since creation back in 2014, 581 posts were written, and this year only ~20. These numbers indicate that there is not enough interest for writing in Persian, at least for now.
Best you can do is to start being more active in that one and try to bring more people into that thread so maybe one day you have a chance for your own local board, but as @Bitcoin_Arena, it won't be easy to get one.