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”. Like this:
3) The new URL started with “translate” will bring you to the WYSIWYG of the specific page.