Learn how to switch the interface language on the platform by accessing the language settings, selecting your preferred language, and confirming the change.

It refers to clicking the link or button on the https://one.raneen.com/ page that leads to the language change option. After that you proceed to "Click Change Language" as the next step.
"Check the language you want" means marking or checking your desired language in the list (e.g., by clicking a checkbox or radio option). "Select the language you want" is the subsequent action to confirm that choice before you proceed to "Confirm language change." Follow both steps in order.
After checking and selecting your desired language, follow the step "Confirm language change." Once confirmation completes, the guide indicates the process is finished with "Done 🚀."
If you don't reach the final "Done 🚀" step or the language doesn't appear changed, repeat the sequence from "Click here!" through "Confirm language change" to ensure the selection and confirmation steps were completed.