Unable to create Dialogflow bot in Nigerian Language

I am Unable to create a bot for my Nigerian client, basically, I have created my bot in the English language but **the issue is Dialogflow is not recognizing Nigerian names.**

I have tried to add around 50+ names in sys.person entity but still, there are many names which Dialogflow does not recognizes.

I can not use sys.any entity as it will create conflict with first name and last name etc (which also may lead error to occur), is there any other permanent solution as Dialogflow also recognizes other language names (i.e Pakistani/Indian names).