Jorge Diaz is a 23-year-old Mexican immigrant who has lived in the United States for 3.5 years and currently works in the natural gas industry in Pennsylvania. He moved to Pennsylvania from Texas and has never taken an official English course, instead learning through conversations with bilingual friends and coworkers. The document analyzes differences and similarities between Spanish and English phonology and grammar and provides examples of errors Jorge makes in his English, related to pronunciation, tense, articles, and other issues. It recommends that continued conversation practice and adult ESL classes would benefit Jorge's further English language acquisition.