Chicano English originated from Mexican immigrants in the 20th century who settled predominantly in California and the Southwest United States. It is influenced by Spanish phonology and grammar but is primarily spoken in English. Phonological features include the devoicing of consonants like [z] and [v], merging of vowel sounds like [æ] and [ɛ], and deletion of final consonants in certain words. Grammatical influences from Spanish include using double negatives and expressing possession with prepositional phrases instead of possessive nouns. Chicano English is a distinct dialect spoken by Mexican Americans in the United States.