An information processing apparatus includes a foreign language dictionary, an input unit through which a user input a letter, a determination unit, a storage unit storing notation information about the letter, a search unit, a converter, and an output unit. The foreign language dictionary stores each foreign word in one of uppercase, lowercase, and a combination of at least one uppercase letter and at least one lowercase letter. The determination unit determines whether a letter input through the input unit is uppercase or lowercase. The search unit searches the foreign language dictionary for a word corresponding to an initially input string of letters in the order in which the letters are input. The converter converts a notation of each letter included in the word retrieved by the search unit according to the notation information. The output unit outputs the word in a notation converted by the converter as a candidate word.