The Bicolanos are descended from the Austronesian-speaking immigrants who came from Southern China during the Iron Age. Many of Bicolanos also have Chinese, Arab, and Spanish admixtures. Most of the townsfolk have Spanish Mixtures and their language is referred to as Bicol or Bicolano. Bicolanos have a high percentage of Spanish introgression with a government sponsored study showing 2 out of 10 Bicolanos or 20 percent of the population being of Spanish descent. Only the Chavacanos among the Philippine ethnic groups, have a higher Spanish percentage at 40% of the population, compared to Bicolano's 20%, while the average percentage of Spanish descent among other Filipino Lowland Christian Ethnic groups are 2-3%. The Bicolano language is very fragmented, and its dialects are mutually incomprehensible to speakers of other Bicolano dialects. The majority of the Bicolano people are devout Roman Catholics due to the Spanish conquering the country and converting them to their religion. Catholic Mass is celebrated daily in many churches in the Bicol Region.