On the course page, the texts which are from our theme is in the below pictures:
You can edit all those texts in our theme from the Loco Translate plugin.
After you translated those texts, your All Courses page will look like this
The price text “Free” is not in the Eduma theme, it is from the LearnPress plugin. Therefore you need to translate it in the LearnPress plugin.
The others in the sidebar of the All Courses page are the widget. You can edit them in your Dashboard => Appearance => Widgets => Sidebar Courses.