Language learning research, evidence, and data
Original LingoBinge data and fully cited evidence reviews on how people actually learn languages, and where they get stuck. Every figure is sourced and every study is free to read and to cite.
- The Netflix Intermediate Wall: An Exploratory 106-Entry IndexA curated learner-suitable catalogue clusters at intermediate, but the pattern remains exploratory until its row-level review record is materially stronger.
- Netflix Hours as Study Hours: The Immersion MathWe already spend hundreds of hours a year watching TV. The research says that time, if it were understandable, could cover a real share of what fluency takes.
- Why People Quit Learning a Language: The Time ProblemHuge numbers of people want to learn a language and start. Most stop. The reason they give, more than any other, is that it takes too long.
- How Many Words You Need to Understand a LanguageComprehension is not about knowing every word. It is about knowing enough of the words that come up most often, and the research is surprisingly specific about how many that takes.
- Do Subtitles Help You Learn a Language? What the Research SaysWatching with subtitles is a habit most of us already have. The question is whether it teaches you anything, and which kind of subtitles works best.
Looking for sourced figures to cite? See the language learning statistics roundup, a curated set of verified stats with a myth-busting section.
Embed or cite the open show difficulty dataset
Most of what follows is an evidence review of other people's research. One asset here is ours and is openly licensed, so it is the one you can download, republish, or embed.
Canonical source: https://lingobinge.com/research/netflix-show-difficulty-index. Updated . Reuse the LingoBinge-owned annotations under CC BY 4.0.
Plain-text citation
LingoBinge Netflix show difficulty dataset. LingoBinge. Updated August 9, 2026. https://lingobinge.com/research/netflix-show-difficulty-index. CC BY 4.0.
HTML attribution
<cite>LingoBinge Netflix show difficulty dataset</cite>. LingoBinge. Updated August 9, 2026. <a href="https://lingobinge.com/research/netflix-show-difficulty-index">https://lingobinge.com/research/netflix-show-difficulty-index</a>. <a href="https://creativecommons.org/licenses/by/4.0/" rel="license">CC BY 4.0</a>.Use with these limitations
- This is a curated catalogue of learner-suitable title-language entries, not a random or representative sample of Netflix.
- CEFR bands are editorial estimates for listening difficulty, not test results or guarantees that every learner will understand the same material.
- Availability changes by country and over time; verify the title in your own Netflix catalogue before choosing it.
- Rows with legacy-curated status predate the explicit review-state field and are not represented as evidence of a named human review.
Download the data
It is an exploratory, curated sample rather than a survey of Netflix. Free to download without a sign-up, and free to republish with credit.
Embed the finder
Paste this into your own page. It loads the live interactive finder, so it stays current on its own. Keep the credit line under it: that is the attribution the licence asks for.
<iframe src="https://lingobinge.com/tools/show-finder/embed" width="100%" height="720" loading="lazy" title="LingoBinge Netflix show difficulty finder"></iframe>
<p>Netflix show difficulty data by <a href="https://lingobinge.com/research/netflix-show-difficulty-index">LingoBinge</a></p>The research points one way: make the time you already spend count. That is what LingoBinge does with the shows you already watch.