Hello,
the problem may is probably cause by the fact, that there are no persian characters defined in the "Character translations" in JoomSEF administration.
There is currently translations for most of the german-based and slavian languages. For persian, you will just need to define the translations there.
Like e.g.: ت|y, س|r, ... (these are just examples deducted from your example, as I do not speak a word in Persian)
For persian, you will need to define the whole alphabet this way. If you do so, please, send us the copy of the definition file, so we can include it for other users also.
Best regards,
ARTIO Support Team