Not many target languages available when creating a project

Hi,


When creating a project, I only can choose from some available target languages:

English (different variants), Spanish (different variants), French (different variants).

So, no Arabic, no German, no Japanese, etc.
Later I see a message: "this language is not available in this installation"! (or something like that)
How can I add more? Is it something that I did when installing Trados? If yes, should I reinstall it?

 

Thank you