Anyone who learns a language from films and series eventually asks the same question: which subtitles should I turn on? Subtitles in my own language so I understand the story, subtitles in the language I am learning, or nothing at all? The answer depends on your level and your goal, and there is useful research to guide the choice.
The three options
- Native-language subtitles (sometimes called interlingual subtitles): you hear the foreign language and read a translation.
- Same-language subtitles (intralingual, or captions): you hear the foreign language and read the same words in that language.
- No subtitles: listening only.
What the research suggests
Studies of subtitles and language learning point in a fairly consistent direction.
Same-language subtitles tend to help listening the most. Seeing the written form of words while hearing them helps learners split fast speech into words and link spelling to pronunciation. A well-known 2009 study by Holger Mitterer and James McQueen, published in PLoS ONE, found that Dutch listeners who watched English video with English subtitles got better at understanding an unfamiliar English accent, while those who watched with Dutch subtitles did not improve and in some conditions did worse than those who watched with no subtitles at all.
Native-language subtitles help you follow the content, which is valuable in itself, especially for beginners. But because you can understand everything by reading, your attention tends to shift from your ears to the text. You may pick up some vocabulary, but listening skills grow more slowly.
No subtitles is the real-world goal, and it trains the skill you need for conversation. For learners who are not ready, though, it can mean understanding too little to learn anything.
Research in this area involves particular languages, learner groups and materials, so treat it as a strong guideline rather than a law. The overall pattern is consistent: the closer the subtitles are to what you hear, the more your listening benefits.
How to choose by level
Beginner (you understand little without help)
Native-language subtitles are fine, especially for longer content where you would otherwise lose the plot. To get more learning out of them, rewatch short scenes with same-language subtitles once you know what happens. Content made specifically for learners is often more useful at this stage than regular TV.
Lower intermediate (you get the gist, miss the details)
Switch to same-language subtitles as your default. This is the stage where they help most: you can follow the story, and the text shows you exactly the words you are not catching by ear. Pause and replay when a line is unclear.
Upper intermediate and advanced
Try without subtitles first. Turn same-language subtitles on only for difficult scenes, strong accents or fast dialogue, then turn them off again. Occasionally watching an episode twice, first without and then with subtitles, is an excellent way to find your blind spots.
What about dual subtitles?
Dual subtitles show the original line and its translation at the same time. They are useful for reading dense dialogue and checking the meaning of specific phrases, and many learners enjoy them. The risk is the same as with native-language subtitles: your eyes go to the line you understand. If you use them, try covering or ignoring the translation line and glancing at it only when you are stuck.
What about dubbing?
Dubbing into your own language removes the foreign audio entirely, so it does little for listening practice. Where it helps is access: it lets you watch content you would otherwise skip, and hearing a dub in the language you are learning (for example, watching a familiar English film dubbed into Spanish) is actually a very effective exercise, because you already know the story and can focus on the language.
Practical tips
- Prefer human-made subtitles. Automatic captions contain errors that can teach you the wrong words.
- Check that subtitles match the audio. Some same-language subtitles on streaming services are simplified or condensed versions of the dialogue rather than an exact transcript.
- Rewatch rather than always watching new episodes. The second viewing, when you already know the story, is where most of the language learning happens.
- Choose shows with lots of dialogue and everyday situations: sitcoms and dramas beat action films for learning.
The bottom line
For entertainment and for beginners, native-language subtitles are fine. For improving listening, same-language subtitles are usually the better tool, and the long-term goal is no subtitles at all. Move along that path as your level grows, and use rewatching to get the most out of each episode.