There are three key differences between English and Spanish: spelling, noun forms, and verb tenses. Spanish has a more phonetic spelling system and consistent rules for noun gender and verb conjugation, while English has more irregular spelling and fewer inflections. These differences can cause errors for Spanish-speaking English language learners, such as omitting subject pronouns, using incorrect tenses, or creating new verb forms. Teachers can help address these errors through instructional tools that explain the differences between the languages.