You'll need to know some language basics
On the island of Amantani, you'll need to know some basics of the Quechua language. While some residents speak a small amount of Spanish (usually the younger children), the majority of the people only speak Quechua.
Good Morning Allin Punchay
Good Afternoon Allin Schisi
Good Evening Allin Tuta
Good Night Pakarinkama
How Are You? Immaynallan Cashanki
Nice To Meet You Sumacian Riccinacusun
My Name Is .... Nokan Sutimin
Can I Help You? Yanapay Quichismanchu
Thank You Sulpayqui
When visiting the Island of Amantani, even if you're not staying the night, it's a good idea to bring gifts of food to the island. There's a market right near the docks of Puno set up for this exact purpose.
Fruit and vegetables are especially welcome
(I wouldn't bring potatoes however)