干女儿用英语怎么说？

daughter-in-law 是儿媳妇
step daughter 是后女儿
adopted daughter 是领养的女儿

干女儿应该是 god daughter
干妈就是 god mother

干女儿 ( nominally ) adopted daughter

干儿子 ( nominally ) adopted son

我在等你收干女儿呢。
I'm waiting for you to get an adopted daughter

我还见过用pet daughter的。。。。

daughter-in-law

哎呀daughter~~