Is there a way for another race (like elf) to count as human? Kind of like Racial Heritage but the other way around.
P.S.: This is for the purpose of a feat (Martial Versatility).
Half-Elves and Half-Orcs count as Human by default.
Most Outsider races have an Alternate Racial Ability to count as Human. At least, Aasimar, Tieflings, Fetchlings, and the Genie-kin do anyways.
Human Guise allows some shapeshifters to count as Human, when in a form that appears Human.
You would probably have to go 3rd party if you are starting with a completely non-human race.