"I'm fluent in Russian, but I didn't grow up, luckily, with sentences like, 'You can't see your children. Hide the guns. Don't shoot the president!'," Trachtenberg explains. "That was not in my repertoire as a six year old."
Fortunately, Trachtenberg's Russian-born mother, Lana, was there to help, even earning a credit as a consultant for the film.
My mom "translated the entire script for me," she said. "We wrote it out phonetically, so that I knew the exact pronunciations. I had to change it to a housewife in the late 1950s."
Killing Kennedy, starring Rob Lowe as the ill-fated president, Ginnifer Goodwin as Jacqueline Kennedy, and Will Rothhaar as Lee Harvey Oswald, will premiere on National Geographic Channel on Sunday.
2014: The Year in Music [PHOTOS]