I keep getting this wrong when I type "her" grandma instead of his. Her should be accepted as kona is bot gender specific

Why is "her" not accepted as an answer?

Please correct this to also accept: Kaʻiulani is her grandmother.

"His grandmother is Kaʻiulani" not accepted...

I believe I got this wrong because I typed "grandma" and not "grandmother".

Grandma and Grandmother are the same thing...

My phone does character substitution thereby causing problems I type "is" and the text is changed to "ia" instead. Anyone how to disable the character substitution?

his and her is not determined by ' kona ' . kona means mine but anything you cant choose and go in. like kona kaa, you can go in a car. kona makua hine, a mother is given with no choice.

Should be ok

Same- kona is not specifically just "his". Can also be "hers".