You certainly can change the word 'Aspect' to 'Criterion' for all workshop activities
on your site using the language customisation feature. Please see the documentation Language customisation
for details. The string you need to find can be found in workshopform_accumulative and workshopform_comments and the string identifier is dimensionnumber (as shown in the attached screenshot).
The workshop in the Celebrating Cultures course on http://school.demo.moodle.net/
has not been changed however, since 'Number of errors' uses the word 'Assertion' rather than 'Aspect'.