- Plesk for Linux
When another language is selected in Horde > Preferences -> Locale and Time not menu items are written in the selected language, some of them still are in English.
Horde webmail is not developed by Plesk team and shipped by Plesk as it is.
The degree of completeness of the localization depends on Horde version. For example, such behavior is expected for Horde 5.2.13
Report the issue to Horde developers directly at https://www.horde.org/support