This app helps to learn foreign languages. It improves your vocabulary. It syncs your learn progress across your devices (Chrome extension / Android app / Web app). It's possible to edit standard dictionaries and create new one.
Afrikaans, Albanian, Arabic, Armenian, Azeri, Basque, Belarusian, Bengali, Bosnian, Breton, Bulgarian, Catalan, Chinese, Croatian, Czech, Danish, Dutch, English, Estonian, Faroese, Finnish, French, Frisian, Galician, Georgian, German, Greek, Hebrew, Hindi, Hungarian, Icelandic, Indonesian, Irish, Italian, Japanese, Kazakh, Korean, Kurdish, Latin, Latvian, Lithuanian, Macedonian, Malay, Malayalam, Maltese, Marathi, Norwegian, Persian, Polish, Portuguese, Romanian, Russian (with images), Scottish, Serbian, Slovak, Slovenian, Spanish, Swahili, Swedish, Tagalog, Tamil, Telugu, Thai, Turkish, Ukrainian, Urdu, Vietnamese, Yiddish
Google Chrome extension: https://chrome.google.com/webstore/detail/mncjkaldafgncphjfjcnngimkiaolcpa