This document summarizes a study on student use of native language in task-based language classrooms in Hong Kong. Interviews with teachers and teacher educators revealed several key findings: 1) Classroom interaction in English was limited, both during whole-class instruction and group work, with students often relying on their native language. 2) While informants acknowledged the inevitable role of native language use, they expressed concern that overuse could hinder English practice and limit monitoring of language use. 3) Strategies used to encourage English use included language monitors, incentives, and recording group discussions, but with mixed success. 4) Task design and implementation are important factors in limiting native language use, such