NavigationControl.KeyboardLanguage Property (Access)
Valid values for this property are 0 (zero), which corresponds to the default system language, or plid + 2 where plid is the primary language ID of a language installed on the current system. For example, the primary language ID of English is 9, so the corresponding KeyboardLanguage setting is 11. For a list of languages and their primary language IDs, search for "Primary Language IDs" in the MSDN Web site. (An exception to this list is Traditional Chinese which is represented by the value 200.)
Setting this property to a language that is not installed may either have no effect or cause an error.