Assignment-activity setting "Require that students accept the submission statement" brings a text for a student on the submission page to check
"This assignment is my own work, except where I have acknowledged the use of the works of other people.".
This string cannot be translated in the language pack even though the language pack has a string for it. This bug needs to be fixed.
Tested on Moodle Moodle 3.5.2+ (Build: 20180920) & 3.3.8+ (Build: 20180920).