The United States has no official language, though English is dominant. Spanish and Chinese are also widely spoken. California especially has linguistic diversity, with many languages from around the world represented. Dialects vary regionally due to influences from early European settlers and indigenous peoples. Religiously, the US is predominantly Christian, though freedom of religion allows many faiths. Economically, different regions specialize in industries like manufacturing, services, agriculture, resource extraction, and technology, with historical shifts from north to south and overseas. Politics remain polarized between Republicans and Democrats.