Aloha: Moʻopuna kāne [mo o-poo-na kay-nay]
Just say it on the phone. Hate you, love you. Either way, you need to get over it. If your out of the house, they can't tell you what to do or not to do. Its their grandson/grandaughter for goodness sake. They need to get over it.
Enkelin
The spanish word for grandson is el nieto.=Penguinlo.webs.com=
Your granddaughter and your niece's son (the grandson of one of your siblings) are second cousins to each other.
Mi Hijo
Eso es tu/su nieto (informal/formal)
Salut: petite-fille
goku only has 2 sons: gohan and goten. he has a grandaughter, pan and a great-great-grandson goku jr
"Cogratulations on your new grandaughter" in Polish is "Wszystkiego najlepszego z okazji narodzin wnuczki".
You may say 'magomusume,' written: 孫娘
'Grandson' = 'barnebarn'