Subtitle Duel -

Ensure you have both subtitle files downloaded and named similarly.

: Formerly known as "Language Learning with Netflix," this is the gold standard. It provides dual subs, a hover-over dictionary, and a "pro" mode to save words for later review. subtitle Duel

Alternatively, use a tool like DualSub to merge two .srt files into one "bilingual" file. Ensure you have both subtitle files downloaded and

: This extension allows you to pick a primary and secondary language directly from the YouTube player menu. For Local Video Files: a hover-over dictionary

: A simpler, lightweight alternative that simply adds a second subtitle track to the Netflix interface. For YouTube:

Most major streaming platforms don't support dual subtitles natively, so you'll need a browser extension or a specialized player.