How can I translate specific exercises/articles/descriptions/platform strings?

You have two methods to do this: 

Method 1: Translation portal

1. Copy the name of exercise/article that you would like to translate
2. Go to the Translation Portal and select your language
3. Paste the name in search box on the top and search for it

Method 2: WYSIWYG (watch this video or follow these steps)

1. Go to the page that you would like to translate
2. Remove www from the URL and instead write translate (see example below)
3. The new URL starting with translate will bring you to the WYSIWYG of the specific page