Online Documentation for Data Import for SQL Server
The Languages page is provided for managing Data Import localization files.
You can create your own *.lng files similar to those available in the %program_directory%\Languages folder, add them to the list of available languages and set the new language as the program interface language.
The table lists all the languages available for localization and the corresponding *.lng files.
Use the ellipsis button to specify the directory where the *.lng files are stored by default.