Being bilingual or multi-lingual is very handy. As well as making life easier when travelling on holidays, its value at work is often underappreciated or not recognised. Last week, I was interviewing a company founder and being able to converse with him in his native Italian built instant rapport. Duolingo is one of the most popular tools for learning another language and they've added some new features to help advanced users become even more proficient.

Yeah, yeah, you can learn all kinds of normal languages on the language-learning tool Duolingo, but can you learn Klingon? Until today, ghobe' (no), but DaH naDevvo' SoH (now you can). Here's how. Buy ngop'!

At long last Duolingo, the free language learning app on iOS, Android and the web, has launched its Chinese course for English speakers. Now you can try your hand at one of the most difficult languages for native English speakers to learn - for free.

iOS/Android: Duolingo recently added a great Japanese curriculum to their app, and now they're following it up with another great course on Korean. It's a good time to be interested in East Asian languages!

Android: Duolingo has finally launched Tinycards, the app that lets you make your own digital flashcard decks, on the Google Play Store.

Duolingo is one of the best free ways to get started learning a new language, and they're finally answering the pleas of wannabe polyglots everywhere by adding Japanese to their curriculum. Sugoi!

Android: Duolingo is introducing Duolingo Plus, a $US10 ($13)/month subscription that will cut ads and let you download lessons for offline use on Android.

Duolingo is a popular language leaning platform that has helped thousands of people develop their multilingual skills for free. Its gamified lessons emphasise quick learning so you can memorise a few new words without much effort while waiting for the bus.