Cultural Differences. The Official Language Perhaps the most troubling factor in the Anglo Mexican relationship. was the cultural conflicts between these two very different people. The Anglos who had agreed to learn the Spanish Language groused about using it for official business and soon began pressing for an exception for Anglos where the Official Language could be dumped for English. The Anglos Faith and Belief. The Anglos had agreed to become Roman Catholics but continued their protestant faith long after they settled in Texas. Although they had promised to fully convert to Roman Catholics some of them found that very difficult when they arrived to Texas. But what do you expect You are basically telling a group of people who have practiced their religion for a thousand years or more to change it all and throw it over their shoulder.