LanguageTag conversion helper define
LanguageTag conversion helper define

Prepared private methods to force compiler errors during conversion to
LanguageTag. Commented current usage on some methods.

Change-Id: If365e24c7cf06bdf33ecd0bc15ddbfe33cd347c0

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core