I'm trying to change the word courses throughout the menus in the site to training.
I have been able to do this in a number of places relating to the pages by changing these, but the various menus and buttons are proving difficult to find or change - 'My Courses', 'Course Expired', 'Take this course', etc.
Is there an easy way to do this with custom css or does this require numerous php file changes?
@grahamch
The second point of yours is right actually. To change a particular text so that it will visible as a translated text at all places. This will need numerous file changes which is not a good idea.
So you can use loco translate plugin for this.
Loc translate Plugin:
https://wplms.io/support/knowledge-base/translate-using-loco-translate-plugin/