Translation:They are Africans and you are Americans
translation issue: ninyi (is rendered you, but could also be you all) Therefore: They are Africans and You all are Americans - should be an acceptable translation.
Yes, the A is longer, but not exaggerated . So it would sound like waah-frica, not Wah - ah- frica
does Wamarekani refer to Unitedstatesians specifically or to inhabitants of the Americas in general?