I've made a list of all the tech I could find that references Humans or Humanity, which does not make sense for most custom races, and the flavor text tag used to change them. You can add them to you faction's flavor text file, which also has dialogue changes, to replace them with new descriptions that use your own races name, or just something more generic:

GenericXenoBiology_Dec XenoBiology_FlavorText_Description
GenericPlanetaryInvasion_Dec PlanetaryInvasion_FlavorText_Description
GenericCulturalInfluence_Dec CulturalInfluence_FlavorText_Description
GenericStellarEmigration_Dec StellarEmigration_FlavorText_Description
GenericCulturalAffinity_Dec CulturalAffinity_FlavorText_Description
GenericWondersoftheGalaxy_Dec WondersoftheGalaxy_FlavorText_Description

Pre-Retribution:
GenericHyperwarpMastery1_Dec HyperwarpMastery1_FlavorText_Description
GenericLogisticalOptimization3_Dec LogisticalOptimization3_FlavorText_Description
GenericAllianceFocus1_Dec AllianceFocus1_FlavorText_Description
GenericPopulationDiversion_Dec PopulationDiversion_FlavorText_Description

There's also GenericBeamWeaponMastery_ShortDec but I couldn't find a flavor text tag for that.