“Roma” was just one of many foreign-language films to figure prominently in the academy’s main categories this year, a trend that may just as well stem from its recent and ongoing push to diversify its ranks. While Cuaron received a director nomination as expected, for example, he was joined by Pawel Pawlikowski for another black-and-white picture, the moody Polish romance “Cold War.” (Pawlikowski previously directed “Ida,” which won the Oscar for foreign-language film in 2015.) 2019 the first time two entirely non-English-language films have earned directing nominations since 1976, when Ingmar Bergman (“Face to Face”) and Lina Wertmüller (“Seven Beauties”)...