What different cultures call grandparents?

Grandparents can be referred to by many different names in different cultures. Some examples include:

-Nana/Nanny (English)
-Oma/Opa (Dutch)
-Nonna/Nonno (Italian)
-Abuela/Abuelo (Spanish)
-Avó/Avô (Portuguese)
-Babcia/Dziadek (Polish)
-Yeye/Papa (Chinese)
-Halmeoni/Harabeoji (Korean)
-Gogo/Sebete (Zulu)
-Nanay/Tatay (Filipino)
-Gran/Gramps (American English)