Each of the three official languages is used as a primary language in certain spheres of everyday life, without being exclusive. The national language of the Grand Duchy, Luxembourgish, is the language that Luxembourgers generally use to speak and write to each other, and there has been a recent increase in the production of novels and movies in the language; at the same time, the numerous expatriate workers (approximately 44% of the population) generally do not use it to speak to each other.