S3.번역기 - this extension for browser make much easy visit of websites on foreign language.
선택한 텍스트, 구문 또는 전체 웹 사이트를 모든 언어로 번역합니다

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New Features:
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* Language learning!
Now you can not only translate, but also learn the selected language!

How do I use the Learning Language mode?
https://www.s3blog.org/s3gt.html#learning

* Automatic translation of subtitles on YouTube!
For enable/disable: Open settings - tab Translate - YouTube Subtitles

* Text-to-Speech!
Options: Actions: "Selected text" and "Single word"

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The extension uses the Google translation public API https://translate.google.com/ and therefore it have more than 100 languages which you can use for quick translation.

Also, the extension able to auto-detect the language of the original text.

There are a lot of simple and complex extensions for browser but they all have same problem: when translating, the format of selected text is lost, while S3.Translator retains the HTML formatting of web pages.

I hope that this extension will be very useful for you.

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Hint!
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* Press "Ctrl" + "Translate full page" - for translate full page via Google Web site
* Automatic translation algorithm when source and target languages are the same (en->en, fr->fr, ru->ru, etc.)
** launch a translation.
** if both languages (source and target) are the same, the add-on checks the target one and if it is not the default translation language, it then translates to it.
** if it is the default translation language, the add-on checks that "Language Learning" is enabled, if it is and the source language is the same as the studied one (in the settings: "replace phrase in this language"), it then translates to the studied language.
** if it doesn't match neither point 2 nor point 3, then it is left as is: en->en, fr->fr, ru->ru, etc.