Question 1

What is LanguageShadow?

Accepted Answer

LanguageShadow is a free Chrome extension that turns YouTube into a language-learning tool. It adds dual subtitles, pauses videos line-by-line so you can shadow (repeat after) the speaker, and gives AI pronunciation scores line by line.

Question 2

Is LanguageShadow free?

Accepted Answer

Yes. The free plan includes dual subtitles, shadowing, and a daily allowance of AI pronunciation grades. The Pro plan ($7.99/month) unlocks 1,000 AI grades per month with no daily limit.

Question 3

Which languages does LanguageShadow support?

Accepted Answer

33 languages and regional voices, including English (US/UK/AU/CA/IN), Spanish (Spain/Mexico), French (France/Canada), Portuguese (Brazil/Portugal), Chinese (Mandarin/Cantonese/Taiwan), Arabic (Egypt/Saudi), German, Italian, Dutch, Russian, Polish, Swedish, Norwegian, Danish, Finnish, Japanese, Korean, Vietnamese, Thai, Malay, Hindi, Tamil, Catalan.

Question 4

How is LanguageShadow different from YouTube's built-in subtitles?

Accepted Answer

YouTube shows subtitles in one language at a time. LanguageShadow shows the original language plus a translation simultaneously, pauses the video after each line so you can speak the line yourself, and grades how close your pronunciation was using Azure speech APIs.

Question 5

Do I need to sign in to use LanguageShadow?

Accepted Answer

No. You can use LanguageShadow without an account. Optional Google Sign-In syncs settings across devices and is required only to upgrade to the Pro plan.

Question 6

Does LanguageShadow work on mobile?

Accepted Answer

No. LanguageShadow is a desktop Chrome extension. Chrome on Android and Safari on iOS do not support extensions, so it only runs on desktop Chrome (Windows, macOS, Linux, ChromeOS).

Question 7

Does LanguageShadow access my YouTube account?

Accepted Answer

No. LanguageShadow reads the subtitle track of the video you are watching, but does not access your YouTube account, history, subscriptions, or any Google account data beyond your email and user ID if you choose to sign in.