You can call father “ପିତା” (pita) in Oriya.
Bapa maa
Father is called "ପିତା" or "ବାପୁ" in Oriya language.
Mother=Bou
bapa
you call god father and mother tresa is a saint
You can call her by her first name or if your comfortable some son-in-laws call them mom.
Chheli
Grandmother
She is your Grandmother.
grandfather
mother/father in law