The MULTINATIONAL keyword defines the name of the default collation sequence for the user to be one of the International sort orders. For more information, see Teradata Vantage™ - SQL Data Manipulation Language, B035-1146.
The MULTINATIONAL parameter determines that the International sort order is to be used. This parameter returns an error unless the hashing algorithm is set to recognize diacritical characters.
On International/European sites MULTINATIONAL collation is two-level.
On Japanese language sites, collation is single-level and is always available.