Usability
Interface 
User-friendliness/complexity of the tool´s interface
Straightforward.
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
Several, among which English, German, French, Spanish, Italian, Russian, Portuguese, Polish, Chinese, Japanese and Dutch.
Respect for privacy Does the tool require registration? Who can see my data? Can I remain anonymous?
Medium. DeepL collects and processes personal data for different purposes, such as targeted advertising, which is displayed on its interface. It mentions employing appropriate security measures to protect user data, but does not provide extensive technical details. Data is collected based on legal bases, such as consent for certain types of cookies and data processing. DeepL complies with the GDPR. See more here.
Saving work for future use Possiblity to save your or others´ work for reuse/reproduction
No.
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)
No