Arduino Playground is read-only starting December 31st, 2018. For more info please look at this Forum Post

There are many different people interested in Arduino, and we need to make the message go through. Help us to translate the contents into different languages. If you think you can contribute, please let us know and we will put as much as we can in making it possible for you to migrate Arduino to your language.

So far, we have a forum in different languages:

an also the wiki can be found in: