5. The apparatus as set forth in claim 1 , wherein the controller enables display of a previously assigned vowel letter of the first language according to a vowel letter direction when the touch pen input type is a pen drag in the vowel letter direction.
5. The apparatus as set forth in claim 1 , wherein the controller enables display of a previously assigned vowel letter of the first language according to a vowel letter direction when the touch pen input type is a pen drag in the vowel letter direction. 6. The apparatus as set forth in claim 5 , wherein the pen drag in the vowel letter direction can be performed on any letter input area.