The Language Hacking Guide is now available in English, Spanish, German, Polish, Italian, French, Portuguese, Chinese, Hungarian, Greek, Hebrew, Vietnamese & Dutch. I've also made minor updates and added a new file for each language so they can be read directly on the Amazon Kindle (as well as the ePub which is readable on iPads/iPods/Android/Sony Readers etc., and the PDF and printable versions).
Also, the Russian, Czech, Turkish, Esperanto and Irish versions are almost ready – the translators just need to finish up the last pages and have them proofread by another native and then I can send them as a free update too (within a few weeks)!
As mentioned previously, the purpose of the guide being in your target language is so you can use it to attempt to read in the target language no matter what your level is, but with a direct translation of everything at hand for when it gets hard.
What is definitely very interesting is that the Language Hacking Guide presentation is now readable in all languages that the guide is available in!
The contents of the guide are also the most efficient way to read my best advice in a structured organised way.
Enjoy hacking your languages!
And finally... One of the best ways to learn a new language is with podcasts. Read more about how to use podcasts to learn a language.