The translation of content is done by actually creating a copy of the default language and then replacing the text with the translation. All images and other settings of the default element are copied.
To create the copy, click on the button with the text 'Translate'. (img. 3.1.1)
A pop up will appear, where you are given two options for translating.
After your selection, click on 'Next'. (img. 3.1.2)
In the next step you can see which content will be copied, to continue click on 'Start processing'. (img. 3.1.3)
The copies, which are set to hidden, will appear in the language column. Edit the content to replace with correct language, by using the pen icon of the element or by clicking on the text of the element. Note also, that the text 'Translate to XXX' is automatically added to headers and text. (img. 3.1.4)
If you want to publish the content, go to the 'Access' tab and uncheck the 'Disable' box (img. 3.1.5).
Below each field the default text is shown with a grey background. If any changes has been made to the default element, added text will appear in green and deleted text will appear in red (img. 3.1.6).