Translation problem

I created a menu item that link to single quiz via "Quiz description layout". I think it's not a module.
I would like to translate few words such as "Continue", "Next", "Previous", "Total time", "Thank you for getting the quiz".
I modified and copied /components/com_vquiz/language/en-GB/en-GB.com_vquiz.ini but in both cases the language displayed is always english. I modified, for example the row 535 NEXT="Prossima".

Hello,
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I solved via Joomla language override, thank you.

Hello,

I read that you have solved the problem through the joomla override. can you please explain ?