The process of creating a localization package is divided into the following steps:
Localization package source file can be created from scratch, but a recommended option is starting from an existing source and modifying it accordingly.
Samples of source files are installed with SiteBuilder LPDK and available at "Program Files\SWsoft SiteBuilder SDK\3.2.0\Localization\LP Sources\3.2.0".
Note: Do not forget to specify the correct culture code for the LP created from a copy!