You could say futago no shimai, but the word for sister (or brother) would depend on whether you are talking about an older sister (onesan) or a younger one (imoto), and that goes for twins too, so you always know which one was born first. Futago is twin.
gemela
'Twin tigers' is双子のトラ (futago no tora) in Japanese.
Ane, older sister. Imouto, younger sister.
双子の猫 = futago no neko
The sentence 'I love my sister' would be 姉が大好きです (ane ga daisuki desu) in Japanese when talking about one's older sister. To say 'I love my sister' when referring to a younger sister, you would say 妹が大好きです (imouto ga daisuki desu).
Imōto no futago no imōto
gemela
'Twin tigers' is双子のトラ (futago no tora) in Japanese.
No. They had a sister, but not a twin sister.
Possibly Futago no Tamashii Futago - (a) twin Tamashii - Soul
You may say 'imouto.'
zan zumi
"avec ma sœur jumelle"
Ane, older sister. Imouto, younger sister.
I do not think she has a Twin sister
She doesn't have a twin sister. But she has a sister, who is a twin.
No, Keke does not have a twin sister. But she has a younger sister who is a twin.