Catalan, the native language of Catalonia has survived since the medieval era despite foreign conquest, a national dictatorship and the banning of its use. Catalan has been the official language since 1983 with the creation of a language policy to re.establish the normative use of Catalan, making it the main language for instruction and communication in public schools. By 2007 the language was spoken, written and read in 97% of the region�fs schools. Yet, a new challenge has emerged with the large influx of foreign immigrants, which has turned Catalonia into the Spanish region with the largest concentration of immigrants. The Catalan government (Generalitat) has responded with attempts to ensure the Catalan language�fs continued use through the creation of three policies. This chapter describes the role the Generalitat has played in re.establishing the use of the Catalan language and analyses how the region has adapted to this new immigrant population.