How to: Delete Translated Strings
After you add translated strings into a database, there are two ways to delete them. You can use the Microsoft Dynamics NAV Development Environment, as described in this article, or the Remove-NAVApplicationObjectLanguage cmdlet that is available in the Microsoft Dynamics NAV Development Shell.
To delete a language layer
In the development environment, on the Tools menu, choose Object Designer.
In Object Designer, select the object for which you want to delete the translated strings.
On the Tools menu, point to Language Module, and then choose Export.
In the Language Module Export window, in the File Name field, enter the path and file name of the file that will contain the deleted strings.
In the Language field, choose the AssistEdit button.
In the Windows Language List window, select the language that you want to delete, and then choose OK.
In the Language Module Export window, select the Delete language field, and then choose the OK button.
How to: Add Translated Strings By Importing and Exporting Multilanguage Files
How to: Add Translated Strings By Using the Multilanguage Editor
How to: Uninstall Language Modules