On Cloud Servers, English is the language enabled by default for Plesk. The Plesk license that comes with the purchase of a Cloud Server is equivalent to a standard Plesk license with one language pack. If you change the current language setting, it applies to all Plesk users.
To change the language of the Plesk panel, follow these simple steps:
You have already configured Plesk.
You have selected Service Provider view in Plesk.
Open a new tab in your browser.
Enter the IP address and the server port 8443 in the following format in the address line: https://123.456.78.90:8443
The message This is not a secure connection will appear.
Click Continue to YOUR IP ADDRESS (uncertain).
Log in to Plesk.
Click on Tools & Settings in the left navigation bar.
In the Plesk Appearance section, click Languages.
Activate the desired language.
Click Make Default.
The new language setting has been saved.