Question

find the relative clause. if it is nonrestrictive, set it off with commas. if it is restrictive, submit the text without making any changes.
1
formula translation which is often called just fortran was the computer programming language of choice from the 1950s to the 1970s.

Explanation:

The relative clause "which is often called just FORTRAN" provides extra, non-essential information about "Formula Translation" (the name is already specific, so the clause doesn't define or restrict it). Nonrestrictive relative clauses are set off with commas.

Answer:

Formula Translation, which is often called just FORTRAN, was the computer programming language of choice from the 1950s to the 1970s.