Length and layout
Spanish is about 15–30% 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 → Español
Translate English video into Spanish subtitles
Upload a video in English. SubFlow transcribes the speech, translates every caption into Spanish, and keeps both languages on the same timeline so you can review them side by side — then export subtitles, a subtitled video, or a Spanish dub.
30 free minutes monthly · No credit card
What changes
English and Spanish, side by side.
| English (spoken) | Spanish (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 | es-ES |
Getting Spanish right
Spanish runs longer than English, so a caption that fit comfortably in English can crowd two lines; splitting the longest captions keeps the reading speed down.
Workflow
From English to Spanish in three steps.
Upload the English video
Add a video or audio file. SubFlow transcribes the English speech into timed captions.
Translate into Spanish
Pick Spanish 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 Spanish or bilingual subtitles, a subtitled video, or a Spanish dub.
Common questions
English to Spanish, 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 Spanish subtitles fit on screen?
Spanish reads comfortably at 15–17 characters per second with about 42 characters per line. Spanish is about 15–30% longer than the English original. Review the longest captions and split any that crowd two lines.
Can I dub a English video into Spanish?
Yes, on the Pro plan. The Spanish dub uses a es-ES 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 Spanish together?
Yes. Export the Spanish subtitles alone, the original English, or a bilingual SRT with both on each caption — or burn either into the video.