The language type that you assign to the language determines what the system copies. If you define the language as a Window Text language, the system copies the portion of the database containing the text that is displayed on the windows. If you define the language as a Voice language, the system copies your choice of voice tables and voice segment directories. (If you want, you can also create an empty database for a Voice language.) If you define the language as a Voice and Window Text language, the system copies both. You can copy the voice portion of the database from one language and the window text portion from another.
When you define a language as Window Text, the window text in the "new" language has to be translated before it is really in the new language. Until you translate the text, it remains an exact copy of the existing text in the "old" language, labelled as a different language.