I think there's a problem with the type-in for Lạng Sơn – it doesn't accept the answer unless you give all the diacritics, and it's the only type-in that does so.
I think there's a problem with the type-in for Lạng Sơn – it doesn't accept the answer unless you give all the diacritics, and it's the only type-in that does so.