二家姐既英文係咩?

In English grammar and culture, there is no seniority sister, either older sister and oldest sister, call them by the name, or just simply sister. There is no first, second ....... elder sister,

second oldest sister is formal

shorts:
second sis
sis (if youre that lazy lol)

外國人家人, 兄弟姊妹一般叫名字, 例如John, Peter, Mary等. 除非向朋友介紹才會講出關係, 兄弟都叫 brother, 亦甚少叫什麼 elder brother 或 young brother 之類. 姊妹都叫 sister.
這是東西方文化的分別.

second sister 我家係咁叫^^

wish can help you

two sister ^_^