twin, calf muscle
El criminal no es Bob sino su hermano gemelo.
The criminal is not Bob but his twin brother.
Siempre confundo a John con su hermano gemelo.
I always confuse John with his twin brother.
Suerte, que tenía un hermano gemelo.
Luckily, he had a twin brother.
Suerte de que tu muchacho tuviera un hermano gemelo.
Lucky your boy had a twin brother.
— Avatar (2009)
A menudo confundo a John con su hermano gemelo.
I often confuse John with his twin brother.
Él me tomó por mi hermano gemelo.
He mistook me for my twin brother.
Él me confundió con mi hermano gemelo.
He mistook me for my twin brother.
Tom es mi hermano gemelo.
Tom is my twin brother.
I have a twin brother.