The low degree of development of Andorra, the limited education in the immigrants' homelands, and the fear of an invasion by Francoist Spain made it more difficult for the immigrants to integrate fully until 1993, when the constitution of the country was approved. Since then, Spanish has become the second most used language of the population living in the country, and moreover is the dominant language of communication amongst people of different linguistic backgrounds, thus triggering recent government efforts to promote more general and universal use of Catalan.