IamA polyglot (12 languages), created language courses and organized the Polyglot Gathering. AMA!
Thank you all for this amazing discussion! Also, please check out my project LearnYu and consider supporting it or spreading the word.
My name is Judith Meyer. You may have heard my voice on GermanPod101, GreekPod101 or DutchPod101. I know German, English, French, Esperanto, Latin, Mandarin Chinese, Italian, Modern Greek, Indonesian, Swahili, Spanish, Dutch (roughly in order of skill) and I've also studied Arabic, Japanese and a bunch of other languages. Details about my languages.
Proof & video speaking 13 languages - video is unscripted and unedited; use the subtitles button at the bottom right.
Some stuff I've done:
Doing everything around GermanPod101 (500+ lessons), GreekPod101, DutchPod101, ArabicPod101 (in the background)
Developing curricula and training lessons writers for the official "Myngle Programs" language lessons on Myngle.com in 8 languages
Creating the prototype of a machine translator for Unikom (sorry can't talk much; NDA), a translation tool for social game company Wooga, grammar systems for various projects...
Lobbying for language rights at conferences organized by the EU and UNESCO
Organizing the Polyglot Gathering, a 4-day conference attended by 215 language geeks who each speak 6 languages on average
For the past year, I have been working on a machine intelligence-based Chinese course.
I'm happy to answer questions about language-learning and any of my work.