Custom race reports

[WarCortez]

I'm kinda puzzled and I can't really find a solution (or how should I search for it): I made a custom race, but their reports have a mixture of the originally picked race (which can be changed to them at the beginning of the game) and general report voice for their researches. Is there a setting where I could give them the naga reports for example, but only if the custom race is picked?

 

[Daffa]

It's embedded to the system of the game AFAIR, not sure if there's a way to handle that.