Length and layout
French is about 15–25% longer than the English original. Both languages are written left to right, so the layout does not change — only the wording and line length do.
English → Français
Translate English video into French subtitles
Upload a video in English. SubFlow transcribes the speech, translates every caption into French, and keeps both languages on the same timeline so you can review them side by side — then export subtitles, a subtitled video, or a French dub.
30 free minutes monthly · No credit card
What changes
English and French, side by side.
| English (spoken) | French (subtitles) | |
|---|---|---|
| Script | Latin | Latin |
| Direction | Left to right | Left to right |
| Reading speed | 15–17 chars/sec | 15–17 chars/sec |
| Line length | about 42 chars | about 42 chars |
| AI dub voice | en-US | fr-FR |
Getting French right
French typography puts a narrow space before ? ! : and ; — a detail native readers notice; the export keeps the characters as written in the editor.
Workflow
From English to French in three steps.
Upload the English video
Add a video or audio file. SubFlow transcribes the English speech into timed captions.
Translate into French
Pick French as the target. Every caption is translated with the surrounding lines as context, then shown beside the original.
Review and export
Fix names and terms, split any caption that runs long, then export French or bilingual subtitles, a subtitled video, or a French dub.
Common questions
English to French, answered.
Can SubFlow recognise English speech automatically?
Yes. Leave the source on automatic detection or pick English yourself. Accents, fast speech and overlapping speakers are handled well by the Whisper model; background music is the most common cause of a dropped line.
Will the French subtitles fit on screen?
French reads comfortably at 15–17 characters per second with about 42 characters per line. French is about 15–25% longer than the English original. Review the longest captions and split any that crowd two lines.
Can I dub a English video into French?
Yes, on the Pro plan. The French dub uses a fr-FR voice and is spoken from the translated subtitles, so correcting a line in the editor changes what the voice says.
Can I export English and French together?
Yes. Export the French subtitles alone, the original English, or a bilingual SRT with both on each caption — or burn either into the video.