When Sanaz Toossi made her Off-Broadway debut with this play about four adult students in Iran taking a class to learn English, even the many who praised it described “English” as “contemplative,” or “oblique,” or (as I did) sharply observed if slow-moving. A year later it was called “quietly powerful” by the judges who awarded “English” the 2023 Pulitzer Prize in Drama, just the most publicized of the many awards it received. Those awards, and the move now to Broadway, where it’s opening tonight at Roundabout’s Todd Haimes Theater, puts the pressure of heightened expectations on “English.” And, although only three years have passed,  we arguably have entered a new era, politically and culturally.