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
English.
Respect for privacy Does the tool require registration? Who can see my data? Can I remain anonymous?
Medium (?). Howjsay claims to only ask for personal information when truly needed to provide a service. In such instances, it collects it by fair and lawful means, with users’ knowledge and consent. Howjsay only retains information for as long as necessary to provide a requested service, and it protects it within commercially acceptable means to prevent loss and theft, as well as unauthorised access, disclosure, copying, use or modification. It does not share any personally identifying information publicly or with third parties, except when required to by law. However, it displays advertisements on its interface, with some of them tailored to language or location. Howjsay’s privacy policy does not mention compliance 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)
Low; Howjsay can hardly be used for anything but searching words’ pronunciation, but it offers more than 170k word pronunciations yet only in one English variant or dialect.