How do you say "twin sister" in Japanese?
For example:

わたしは、＿＿＿＿＿＿＿＿とおなじぐらいかっこいいです。

I want to say my twin sister and I are about the same level of coolness.

Question

How do you say "twin sister" in Japanese?
For example:

わたしは、＿＿＿＿＿＿＿＿とおなじぐらいかっこいいです。

I want to say my twin sister and I are about the same level of coolness.

Answer

you can say 双子の妹（姉）.
in japan, sister has 2 meaning, the one is 妹 and the other is 姉, and you have to make it clear in japanese.

and we dont say かっこいい if you are a woman because the word かっこいいis used for men.

thank you :-D

Answer

twinsister→ふたご　の　あね　　　beautiful　women→びじん　　　pretty girl→かわいい 
０～２０years old→かわいい　　over25→びじん
antonym  gorilla girl→ぶす　　やばい（slang)
 use language Japanese people
dog glared me  ((( ；ﾟДﾟ)))

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