Subtitles vs dubbing vs voice over: reaching new language audiences

Subtitles

Subtitles show translated text on screen while viewers hear the original audio. They are the fastest and most affordable way to make videos available in other languages, and they keep the original speaker's voice and personality. Subtitles also help viewers who watch without sound, which is common on social media. The trade-off is that viewers must read while watching, which can be tiring for long or fast-paced videos and less suitable for young children. Subtitles can be delivered as separate files that viewers switch on, or burned into the video. Our subtitles and captions guide explains the formats.

Translated voice over

In a voice over translation, a narrator records the translated script, either replacing the original narration or speaking over it at lower volume. It works well for narrated content such as explainers, training videos, documentaries and product demos where lip movements are not visible or not important. It costs more than subtitles but lets viewers focus on the visuals. Choose a voice artist who is a native speaker of the target language and suits your brand.

Full dubbing

Full dubbing replaces all dialogue with performances in the new language, timed to match lip movements and emotions. Each character usually has a separate voice actor. It provides the most natural viewing experience and is common for entertainment, animation and children's content. It is also the most expensive and time-consuming option, requiring adapted scripts, casting, direction and careful mixing.

Side-by-side comparison

What about AI voices?

AI voice and dubbing tools have improved and can produce translated audio quickly. They can be useful for internal content, drafts or large volumes of simple videos. For customer-facing or emotional content, quality, pronunciation and tone still need checking by native speakers, and you should review the tool's terms on voice rights. Our human vs AI voice article explains the trade-offs.

How to prepare

• Start with an accurate transcript or subtitle file in the original language. Transcription services can create one.
• Provide a glossary of product names and terms, and say which should stay untranslated.
• Share the video, so translators understand context and timing.
• For voice over and dubbing, provide separate audio tracks for music and effects if available, so the new voices can be mixed cleanly.
• Mention on-screen text that also needs translating, such as titles and graphics.

Adaptation, not just translation

Spoken language must fit the timing of the video. Translations for subtitles must be short enough to read, and scripts for voice over or dubbing must match the length of the original speech. Jokes, idioms and cultural references may need adapting. This is why localization specialists are valuable for videos aimed at new markets. Our translation vs localization article explains the difference.

Checking quality

Ask a native speaker who was not involved in the translation to watch the final video. They can spot awkward phrases, timing problems, mispronunciations and subtitles that disappear too quickly. Check on-screen text, credits and calls to action as well. For subtitles, make sure line breaks are natural and that text does not cover important visuals. For voice over and dubbing, listen for consistent volume between the new voice, music and effects.

How to choose

Many organizations start with subtitles for most videos and invest in voice over or dubbing for the most important ones, such as flagship product videos, training courses or content for children. Test with your audience: viewing time and feedback show whether subtitles are enough or whether audio in their language makes a real difference.