Get website regex from a website link

Get website regex from a website link

if I have a website like: www.google.com/en/my-page/anotherpage
how is it possible that with reg-ex to get: /en/my-page ? I am using this
reg-ex in the IIS?
So far I have done something similar to this:
^(?:\\.|[^/\\])*/((?:\\.|[^/\\])*)/
but it is returning /en/my-page/ and I want it to return /en/my-page