All suits count as each other. Stone Cards count as all suits.
Reference: While not exactly a jester, stories of Akbar-Birbal are very popular in India due to Birbal's wit. The joker ability is a reference to him being the only Hindu to adopt Din-i-Ilahi, the religion founded by Akbar. This religion combined aspects of various religions and wanted all sects and religions to be considered one.
While this is similar to Smeared Joker, it allows any five card hand to be a flush. It also allows flushes to include stone cards without needing four fingers.