Most Arab flags look the same. Palestine flag looks like the Jordan flag, Yemen flag looks like the Egypt flagWeird diaspora jaahil kid Sudan was an Arab before they even became a state and Beja clans or tribes spread the Arab language to their neighboring tribes such as the Beni Amr people that they have assimilated in to their social grouping who predominantly speak Arabic alongside their mother tongue Tigrayit.
And the Flag was changed by Nimeiry coup in 1969 who was a Nasserite and took the Egyptian pan Arab colors that many Arab nationalist govts did in the 60s.