When the course language is forced to english, to click on the turnitin actvity link from the course homepage provides the following message :

Coding error detected, it must be fixed by a programmer: Attempt to re-define already required string 'cancel' from lang file 'moodle'. Did you already ask for it with a different $a? Annuler !== Cancel
Stack trace:

• line 835 of /lib/outputrequirementslib.php: coding_exception thrown
• line 303 of /lib/outputrequirementslib.php: call to page_requirements_manager->string_for_js()
• line 1055 of /lib/outputrequirementslib.php: call to page_requirements_manager->init_requirements_data()
• line 320 of /lib/outputrenderers.php: call to page_requirements_manager->get_head_code()
• line 26 of /theme/serenity/layout/general.php: call to core_renderer->standard_head_html()
• line 647 of /lib/outputrenderers.php: call to include()
• line 605 of /lib/outputrenderers.php: call to core_renderer->render_page_layout()
• line 6356 of /mod/turnitintool/lib.php: call to core_renderer->header()
• line 234 of /mod/turnitintool/view.php: call to turnitintool_header()