Usability
Interface 
User-friendliness/complexity of the tool´s interface
Simple, somewhat old-fashioned.
Time efficiency Time needed for mastering the „how-to“ of the tool and a production of a task
High.
Interface language(s) The number of languages in which the tool is currently available/adaptable to
English + 14 others.
Respect for privacy Does the tool require registration? Who can see my data? Can I remain anonymous?
Medium. Akinator collects data to improve its services but does not specify the types of data collected. It mentions taking reasonable measures to protect personal data, although it lacks specific details about security practices. Data processing is based on user consent, especially for geolocation and cookies. Users can oppose data collection and manage cookie settings. However, the website provides links to external websites which may also collect personal or general data. The use of these websites and the collection and use of personal data by these websites is not regulated by Akinator. It also displays some quite intrusive ads on its interface. Akinator complies with GDPR. See more here.
Saving work for future use Possiblity to save your or others´ work for reuse/reproduction
To some extent: users can add their characters to Akinator and play with them later on.
Tailorability (If so, how?) Possibility of the tool to be used for a range of different activities (e.g. to what extent you can organize a project assignment with a central activity based on this tool)
To some extent. Akinator’s database contains hundreds of characters, so there are many possibilities to play.