Rolling Stone concludes by saying, "the film gets inside your head and emerges as something intimate and epic, a linguistics odyssey through space and time. It’s the stuff that dreams are made of." The New Yorker says, "what lingers, days after you leave the cinema, is neither the wizardry nor the climax but the zephyr of emotional intensity that blows through the film." The Atlantic concludes by calling it "the best film of the year, ambitious in conception and extraordinary in execution".
Roger Ebert's site calls it "ambitious and moving" and "ambitious, accomplished filmmaking that deserves an audience". Rotten Tomatoes has a critics rating of 94%.