Maternal grandparents (mother's father and mother)

Literally

maternal grandfather and maternal grandmother

When to use it

Use these specifically for your mother's parents. Bangla keeps maternal and paternal grandparents separate: your father's parents are dada-dadi, never nana-nani. The nana/nani pair is the standard usage in Bangladesh; many Hindu families, especially in West Bengal, say dadu and dida or didima for the mother's parents.

How it feels

Warm, affectionate everyday family terms.

Formality

Neutral