Lingua.ly provides users with a free dictionary and learning platform to highlight foreign-language words (currently only for English, French, German, Spanish, Arabic, Portuguese, Italian, Dutch, Russian and Hebrew) and add them to a cloud-based account.
How does it work?
You register for free and start reading articles from newspapers like Zeit.de, Spiegel.de according to your preferences and interests. Optionally you can install the free Chrome extension so that whenever you are reading a German article and stumble over an unknown word, you can get an instant translation and pronunciation by double-clicking it.
After you’ve done that a few times, the Chrome extensions saves these words in a library and keeps checking every few days if you still know them.
I find this tool to be quite useful, especially for advanced learners.
Test it and let me know what do you think of it.