You have opened a project. Options > Settings > User > Translation > Parts management.
Utilities > Parts > Management > [Extras] > Translation > Settings. Select the Parts management tab.
In this dialog / this tab you can specify which multi-language fields in the parts management are to be translated. All settings are user-specific.
Overview of the main dialog elements:
Describing properties:
All the properties relevant for the translation are listed in this field. If the check box in front of the property is activated, the property is translated in the next translation run.