Why Non-Native English Speakers Use Subtitles More Than Native Speakers (Backed by Data)

English has cemented itself as the global lingua franca, serving as the default language of international business, science, aviation, and—most visibly—digital entertainment. However, a profound demographic asymmetry exists: of the estimated 1.5 billion English speakers worldwide, only about 370 million are native speakers. The remaining 1.1 billion speak it as a second or foreign language. When these non-native speakers consume English-language videos, their relationship with the screen is vastly different from their native-speaking counterparts. Specifically, non-native English speakers use subtitles far more consistently, intensively, and by default.

While native English speakers have recently begun adopting subtitles at unprecedented rates (largely to combat muddy audio mixes or quiet environments), for non-native speakers, subtitles are a cognitive necessity. In this post, we will explore the historical policies, eye-tracking cognitive science, and economic research that explain this behavior, and discuss why creators must design their media with these viewers in mind.

1. The Historical Divide: Subtitling vs. Dubbing Cultures

The divide in how different nations approach foreign-language media goes back to the introduction of sound film in the late 1920s and early 1930s. Countries made systematic decisions about how to localize foreign content, and these historical choices continue to shape modern language proficiency.

• Subtitling Nations (Nordics & Netherlands): Countries like Sweden, Norway, Denmark, Finland, and the Netherlands chose to subtitle English media instead of dubbing it due to smaller population sizes and lower costs. As a result, citizens are exposed to English audio with local-language subtitles from early childhood.
• Dubbing Nations (The Big Four): Larger European countries like Germany, France, Italy, and Spain heavily subsidized voice-dubbing industries. Consequently, viewers grew up rarely hearing native English voices on television.

The long-term impact of this split is massive. A landmark July 2025 study published by the National Bureau of Economic Research (NBER Working Paper No. 33984), titled "Out-of-School Learning: Subtitling vs. Dubbing and the Acquisition of Foreign-Language Skills" by Baumeister, Hanushek, and Woessmann, analyzed decades of educational data across Europe. The researchers found that subtitling foreign media has a positive impact of over one standard deviation on English listening and speaking skills compared to dubbing.

2. Cognitive Science: The Dual-Input Advantage

Why do subtitles help non-native speakers so much? The answer lies in cognitive load theory and how the brain processes language. When listening to a second language (L2), the listener's brain must execute multiple tasks simultaneously: phonetic decoding (segmenting continuous sound waves into distinct words), lexical retrieval (matching those words to known meanings), and syntactic analysis (understanding the sentence structure).

For non-native speakers, subtitles provide a **dual-input advantage** (intralingual subtitles: English audio + English text):

• Phoneme-to-Grapheme Mapping: Hearing a word while reading it helps L2 speakers resolve ambiguous sounds, especially when the speaker has a strong regional accent or uses unfamiliar slang.
• Reduced Acoustic Distortion: Background noise, music, and fast speech rates can easily mask word boundaries. Subtitles strip away this acoustic distortion, providing immediate lexical clarity.
• Anxiety Reduction: Reading along reduces the anxiety of missing critical dialogue, which in turn frees up cognitive bandwidth for deeper comprehension and enjoyment of the video.

3. What Eye-Tracking Studies Reveal

Eye-tracking research published in journals like *JoSTrans* (The Journal of Specialised Translation) reveals that non-native speakers read subtitles in a qualitatively different way than native speakers:

• Fixation Time: L2 speakers spend a significantly higher proportion of time (up to 40% more) gazing at the bottom subtitle area compared to native speakers. Their eyes naturally default to the text.
• Word-by-Word Reading: While native speakers read in quick saccades (skipping words they can easily predict), non-native speakers read in a deliberate, word-by-word manner to verify meaning.
• Sensitivity to Speed: Non-native speakers are highly sensitive to subtitle speed. If subtitles exceed 20 characters per second (cps), L2 comprehension drops dramatically as their eyes fall behind the audio pacing.

4. The Creator Takeaway: Subtitles Are Your Real Medium

If you are a content creator, a brand, or an educator publishing in English, you must realize that **the majority of your audience is likely non-native**. Relying solely on audio or messy, auto-generated closed captions is a major retention killer. Here is how you can optimize your videos for the global majority:

1. Use Syntactic Segmentation: Do not let text split awkwardly across lines (e.g., separating an adjective from its noun). Segmenting captions based on natural phrases reduces cognitive strain for L2 readers.
2. Control the Reading Speed: Keep subtitle speeds under 20 characters per second. Give viewers enough time to read the text and process the visual elements of the video.
3. Leverage Karaoke-Style Styling: Word-by-word highlighting (like the ASS style presets in SRTGen) helps L2 readers trace the exact syllable being spoken, making listening comprehension even easier.

Create Global-Friendly Subtitles with SRTGen

Adding and styling subtitles manually for a global audience is incredibly time-consuming. That is why we built SRTGen. Our advanced AI transcribes audio with up to 99% accuracy, automatically segments lines for natural reading flow, and exports high-performance, hardcoded subtitles that render flawlessly on any device.

Ready to reach the global majority? Head to the SRTGen Workspace and subtitle your next video today!