Then this is another problem obviously linked to Internet being so English Speaking.
Actually I am quite surprised with their Country list
, never noticed before.
With Azerbaijani, Arabi, Armenian and Kurdî they could have gone up to Persian I think.
Then, I am not sure about what would be the closest language, the one you could expect an editor to understand Persian as well, if what I say isn't stupid (you said there was similarities with Arabic, but this does not mean an Arabic editor would be able to review your site).
Otherwise, I guess you could try becoming yourself an editor, I am sure this would not be easy nor fast, but there is a lake, and Persian Internet seem to be growing quite fast now, so there is as well a need.
A long run, but very good for you if you are the one to have opened a new regional directory in DMOZ
But this is not something you can do without knowing it will be 1) hard to become and editor from scratch, but not impossible and 2) even harder as you are here willing to build a new regional category, being the top of all (as you know, DMOZ editors have to last before they get to moderate more general categories).
But, this could be something to think of, Persian net wise, and could as well be a collective initiative, many people writing to ask for the same thing, but no spam, will have more weight.
In all case you should take great care writing to them.
As well, a cool thing would be why not creating Persian directories yourself, I mean if there is a lake ...
Then, for other directories, you can still try to submit out of the Persian categories, if there are now Persian Categories, just use the English ones and put an English description telling after all your site is Persian.
I mean, it's obvious some will be refused, but some won't.
Bots will still get to associates keywords, even in English, but we know you have English keywords as well, with your web site.