On Cloud Servers, English is used as the default language for Plesk Onyx. To change the language of the Plesk panel, proceed as follows:
You have already configured Plesk Onyx.
You have selected the view Service Provider view in Plesk Onyx.
Open a new tab in your browser.
In the address bar, enter the IP address and the server port 8443 in the following format: https://123.456.78.90:8443
The message This is not a secure connection appears.
Click Go to YOUR IP ADDRESS (insecure).
Log in to Plesk.
In the left navigation bar, click Tools & Settings.
In the Plesk Appearance section, click Languages.
Check the box for your desired language.
Click Make Default.
The language setting has been saved.
Prerequisites: The Plesk license that you received with the Cloud Server is a default Plesk license with one language plan. That means that the current language setting always automatically applies to every Plesk user.