Here is a related JIRA issue, about RTL language support:
http://jira.atlassian.com/browse/JRA-14119

As far as I can see, the issue's status  is neither "closed", nor its resolution is "fixed". Anyways, it should be doable in language pack form, with some UI tweaks.

But the important point is that, I don't think it's legal to resell any of Atlassian products here. Maybe they're just charging for persian language support? Even in that case, I'm not sure it's legal. As far as I know, they don't have any representative, reseller or official  support in Iran. Neither they tend to have, because of the sanctions. Maybe I'm missing a point here.
Arash, would you please let us know how they're doing so, and whether they are part of Atlassian company or have any contract with them to resell it here?