This document summarizes the language differences between English and Spanish from the perspective of a student named Jane who is a native Spanish speaker. It notes that Jane learned English primarily from watching TV shows and is now teaching her parents some English. The document then lists 21 common mistakes made by Spanish speakers learning English and provides examples of errors Jane made in writing, including issues with spelling, verb usage, and word order. It concludes by suggesting focuses for continuing to teach Jane English, such as vowel combinations and differences between Spanish and English pronunciation.