How to activate dynamic translation for your courses storefront
First, you should check the dynamic translation checkbox in Courses Plus app settings
Follow the instruction pops up
Copy the code and replace the content in your theme's code editor in Locales → en.default.json file.
And do not forget to create and activate needed language itself
Then, in the translation app you should find Default theme content → General. There could be a lot of phrases, and you should list some pages till the Courses block
(the screenshots show Shopify's default translation app - Translate&Adapt, but the flow is similar for any app)