Prime Video
Amazon Prime Subtitles: Turn On, Change and Fix Them
How to turn Amazon Prime subtitles and captions on or off on any device, change their language and size, fix common problems and watch with two at once.
InterSub Blog
Learning languages with films, series and online courses: guides, platform reviews and InterSub news.
JapaneseBest Anime to Learn Japanese: 12 Picks by Level
The best anime to learn Japanese, from beginner to advanced: why each show suits learners, where to watch it legally, and one study tip for each.
ChineseBilibili English Subtitles: How to Watch Bilibili in English
How to get Bilibili English subtitles on Bilibili.tv and bilibili.com, what to do when a video only has Chinese, and which browser extensions translate it.
AIChatGPT for Language Learning: Prompts, Limits, AI Tutors
ChatGPT for language learning: what it does well, where it fails, 8 prompts to copy, and AI tutors that know the words you met in real shows.
Dual subtitlesComprehensible Input: How to Learn From Shows
Comprehensible input explained: Krashen's input hypothesis, how much you need to understand, and a four-stage subtitle setup for learning from shows.
Disney+How to Turn On Subtitles on Disney Plus (Every Device)
How to turn on subtitles on Disney Plus in a browser, on a phone, TV or Roku, change their language and look, fix missing tracks, and watch with two at once.
Dual subtitlesDualsub vs Trancy vs Subadub: 7 Extensions Compared
Dualsub, Trancy, Subadub, DualPiP, Sublango, Language Reactor and InterSub: what each one does, where it works, what it costs and who it suits.
Dual subtitlesDuolingo Alternatives: 13 Apps That Fill the Gaps
Honest Duolingo alternatives grouped by what they add: tutors, courses, real listening and flashcards. Prices, free plans and a weekly mix to try.
FrenchBest French Shows to Learn French on Netflix, by Level
The best French shows to learn French on Netflix, sorted by level: accents, speed and slang in each, how to get French subtitles, and a two-week plan.
HBO MaxHBO Max Subtitles: Turn On, Change, Fix (and Remove ASL)
HBO Max subtitles on every device: turn them on or off, change language and style, remove the ASL interpreter, fix captions, and watch with two lines at once.
JapaneseJapanese Honorifics: -san, -kun, -chan and More in Anime
Japanese honorifics as you hear them in anime: -san, -kun, -chan, -sama, senpai, -dono, -tan, -chi, with example lines, a reference table and how to spot them.
Dual subtitlesLanguage Reactor Review and the Best Alternatives (2026)
An honest Language Reactor review: strengths, Pro pricing, browser limits, and the best Language Reactor alternative for Firefox, Prime Video or Disney+.
KoreanLearn Korean With K-Dramas: A Practical Guide
How to learn Korean with K-dramas: where to find Korean subtitles, how to turn them on in Netflix, a step-by-step method, and dramas to start with.
JapaneseNetflix Japanese Subtitles: How to Turn Them On and Learn
How to turn on Netflix Japanese subtitles on a computer, TV or phone, why they are sometimes missing, and how to watch with Japanese and English at once.
Dual subtitlesShadowing Technique: How to Practice with Real Videos
The shadowing technique for language learners: what it is, why it helps, and a step-by-step routine with YouTube, Netflix and course videos.
RussianRussian Movie Sites: Where to Watch Russian Movies Online
Where to watch Russian movies online legally, often free and with English subtitles: Mosfilm, studio YouTube channels, Russian streaming sites and Netflix.
AIWhat Is Lemmatization, and Why It Makes Translations Better
Lemmatization meaning in plain words, stemming vs lemmatization with examples, and how a dictionary extension uses it to translate the right word.
NetflixBest Netflix Extensions for Chrome: 5 Worth Installing
The best Netflix extensions for Chrome in 2026: dual subtitles, playback controls, watch parties, and what happened to Super Netflix.
YouTubeCS50 Subtitles: Watch CS50 in Your Own Language
CS50 lectures come with English captions. How to get CS50 subtitles in German, Arabic, Chinese, Dutch, Italian or Portuguese, with English kept on screen.
AIAI Subtitle Translation: Watch Any Video in Two Languages
How AI subtitle translation works in a browser, which engines InterSub uses, where it helps and where it doesn't, and how to turn it on.
Online coursesCoursera Chrome Extension: 6 Picks for Coursera and Udemy
Six Chrome extensions for Coursera and Udemy: speed, focus, notes, reading help and translated subtitles, plus what both sites already do without extensions.
Chrome extensionsChrome Extensions for Language Learning: 6 Worth Trying
Six Chrome extensions for language learning compared: InterSub, Language Reactor, Trancy, Migaku, Readlang and Toucan, and which one suits how you learn.
YouTubeBest YouTube Channels for IELTS Preparation, Part by Part
The best YouTube channels for IELTS preparation: E2 IELTS, IELTS Advantage and IELTS Liz, what each is good for, and how to practise listening.
NewsInterSub Hits 10K Users & Launches Free Version!
We're thrilled to introduce our new ad-supported free version! Now you can enhance your language skills while watching Netflix, YouTube, and Prime Video without spending a penny!
JapaneseJapanese Movies With Subtitles: What to Watch and Where
Japanese movies with subtitles for learners: films and series that are easy to follow, where to watch them, and English or Japanese subtitles, or both.
SpanishSpanish Shows on Netflix: 12 Series to Learn Spanish
Netflix shows to learn Spanish, sorted by level: what to watch first, which accents you will hear, and how to watch with Spanish and English subtitles at once.
NetflixNetflix Two Subtitles: How to Watch With Two at Once
Netflix plays one subtitle track. How to get dual subtitles on Netflix with a browser extension, on a computer and on a TV, and which settings help you learn.
Dual subtitlesDouble Subtitles: Two Subtitles at Once for Learning
What double subtitles are, when two subtitles at the same time help you learn a language, when they get in the way, and how to show them in YouTube or VLC.