Your sister's husband is your brother-in-law, but in conversation you would not use that term as a title, but would call him by name.
sisters in law
She is your sister-in-law.
Your sister-in-law.
your brother-in-law :)
Brother-in-law.
Phillipp uncle
There is no specific word for the husband of your wife's sister. If you need a phrase, call him your "sister-in-law's husband."
Jijaji- brother in law
Your sister's husband is your brother in-law, there's no different word in english to describe the husband of an older or younger sister.
Your niece
nephew!
Brother-in-law