This document discusses a proposed research study that will analyze how intonation patterns in Spanish affect English spoken by Spanish speakers. Specifically, it will look at how Spanish intonation patterns influence English tag questions. The study will select 4 Spanish-speaking English language learners at the B2 level to observe their speaking tasks, recordings, and interviews. It will use a case study approach and data triangulation to compare observations with interviews and tasks. The goal is to determine which aspects of Spanish phonology influence English intonation acquisition and identify differences in intentions between Spanish and English tag questions.