Dual-Subtitle Speaking Drill

Helps 'understand but can't speak' learners practice output with dual-subtitle clips

Problem

A French learner at level 60 on Duolingo arrived in Paris and could barely speak; they actually learned English by rewatching Game of Thrones with English subtitles and audio. Existing tools are either input-only or lack suitable clips and feedback for shadowing practice.

Solution

A dual-subtitle shadowing tool: after users pick a show or video clip, it overlays bilingual subtitles, segments lines, lets users record shadowing attempts, and gives lightweight speech scoring on fluency and pronunciation, turning passive watching into measurable speaking practice.

Users

Intermediate language learners, self-learners practicing speaking through film and TV, language teachers

MVP

Upload or select video clips with subtitles; align bilingual subtitles and segment sentences; shadowing recording with playback comparison; simple pronunciation scoring via browser speech API; 10-minute daily practice plan

Revenue

3 free clips, subscription for unlimited clips and scoring history (e.g., $8/mo)

Why now

Browser speech recognition is good enough for shadowing scores, and subtitle content is abundant; big language apps lean gamified input, leaving output practice as a clear gap