StringForm with named arguments

In python, this is possible:

example:

a = "{x}, {y}".format(x=5, y=12)
print(a)

result:

5, 12

In Mathematica, I used

StringForm ["``,``",5,12]

but I couldn't use named arguments.

Is there any way to do this in Mathematica? like a :

StringForm ["`x`,`y`",x->5, y->12]