How to create dual-language subtitles
TL;DR — Build bilingual subtitles by combining translated lines with existing subtitle timing and checking the result in one subtitle file.
Dual-language subtitles work best when both language tracks share the same cue timing.
Quick answer
Create one subtitle file with the original line and translated line inside each cue. If you already have two files with matching timestamps, use the Subtitle Merger to inspect and combine them, then clean any duplicate or overlapping cues by hand.
Recommended cue format
1
00:00:01,000 --> 00:00:03,500
We need to leave now.
我们现在得走了。
2
00:00:04,200 --> 00:00:06,000
The train arrives in five minutes.
火车五分钟后到。This keeps both languages inside the same timing block, which is easier for most players than two separate subtitle tracks.
Step-by-step workflow
- Start with the subtitle file that has the correct timing.
- Add the translated line below each original line.
- Keep each cue short enough to read on screen.
- If you have two separate files, use the Subtitle Merger to compare cue order and timing.
- Use the Subtitle Cleaner if copied text includes HTML tags or odd spacing.
- Preview the final file in the target player.
When a merger helps
A merger is useful when a translator sends a separate subtitle file and you need to line it up with the original. It can reveal whether the two files have the same cue count, matching time ranges, and obvious overlaps.
Common mistakes
Keeping two separate cues at the same time
Some players show overlapping cues poorly. For bilingual delivery, put both languages in one cue when possible.
Making every cue too tall
Two languages can easily take four lines. Keep wording concise and check mobile playback.
Translating after timing changes
If the video was edited, fix timing first. Then merge or write the bilingual text.
Related guides
Use the Subtitle Merger
Merge two SRT, VTT, or ASS subtitle files into one sorted subtitle file in your browser. No signup, no upload, and everything runs locally in the browser.
Open Merger