Call this function for each language contained in the source file.
Syntax
Expression.AddLanguage (LangID as Integer) as void
Expression Object of type PslResData
LangID A language id.
Note: If the language in the source file is given as a string like ENU for English USA, you can use the method PassoloApp.GetLangID to convert the language to the numerical value needed. If you can get a language information from the source file use 0 (Neutral Language) as LangID.