It’s hard to actually define what Fortran means. There’s features in the standard that are not portable, and many portable features that are not standard. It’s kind of a mess, and getting worse.
FORTRAN means what it's always meant. The standard is a guide for the implementor. The user needs to code to the implementation.
It's a different way of thinking about languages than most people usually do, but it's been true for FORTRAN since the 1950s and is true to some extent of every language with multiple implementations today.
