2. The portable computer according to claim 1 , further comprising: a saving unit to save a table of input key values representing the key array corresponding to the plurality of languages.
2. The portable computer according to claim 1 , further comprising: a saving unit to save a table of input key values representing the key array corresponding to the plurality of languages. 5. The portable computer according to claim 2 , wherein the control unit generates a message to notify a user of the portable computer that the predetermined language to which the OS operates has a plurality of characters different than characters labeled on the input keys.