Specifically Leistenpforte is difficult to find on Google.

This may be a better fit than canal and is from the web reference cited below, just search for orifice:

What is the inguinal orifice?
The inguinal canal is a passage in the lower anterior abdominal wall located just above the inguinal ligament. It starts from the internal inguinal orifice, extends medially and inferiorly through the abdominal wall layers and ends in the external inguinal orifice. This canal is about four to six centimeters in length.