Yep she lost knowledge, not her memories or other things that made her unique.Not completely. Uhura still retained her command of Swahili—the imperialist Chapel admonished her for using that language—suggesting that the wipe wasn’t complete.
In other words, perhaps whatever intangibles that made Uhura unique were retained, including knowledge and skills developed at an early age, somehow escaping the effect of Nomad’s beam. At least that’s how I’ve reconciled this baffling development.