Yes, the claim is currently true, but may or may not have been true at the time of the claim.
[I am going to use the timestamps shown to me by Twitter; these may be regional and differ for you.]
Twitter's advanced search currently shows only five distinct tweets with above 90,000 likes with Farsi as the language:
At January 12th, 9:55am, Saeed Ghasseminejad made his claim.
After that there were more relevant tweets:
Mark Hamill quote tweeted Trump's first Farsi tweet. It currently has 279.5K likes.
Mark Hamill quote tweeted another of Trump's (English) tweets. It currently has 159.3K likes. [Edit: Link was wrong, and I can't find it now.]
If Trump's tweet only had 100K likes at the time of the claim, then the belly-dancer would still be more popular, but at the time I wrote this answer, Trump's tweet was most popular.
There are some potential sources of error:
- A deleted tweet (or a Farsi speaker who blocked me on Twitter!) may beat those numbers.
- Twitter may display different numbers of likes to different people.
- The Twitter Search feature is not reliable. Tweaking the search to change the minimum number of likes means it sometimes, incorrectly, doesn't show any of these tweets.
- I can't be sure that there isn't a campaign since the claim to push the belly-dancing tweet up in numbers in an attempt to overtake Trump's tweet.
(The part of Ghasseminejad's claim that this was evidence from a strong show of support by Iranians for Trump's Iran policy is not justified. It is likely a substantial number of the likes were his English-speaking supporters.)