To make it possible to generate a phonetic equivalents (kanji) reflecting a design preferred by a user, such as a foreigner.SOLUTION: An information terminal device 10 comprises: a kana character string specification unit 24 that specifies a kana character string matching acquired pronunciation of a foreign language; a keyword acquisition unit 25 that acquires a keyword preferred by a user in a foreign language with a voice input unit 16; a font determination unit 26 that determines a font to be used to a font belonging to a group to which the keyword belongs by using correspondence data; a kanji string conversion unit 27 that converts kana characters forming the kana character string specified by the kana character string specification unit 24 into kanji by using kana-kanji correspondence data to convert the kana character string into a kanji string; and a phonetic equivalent generation unit 28 that generates phonetic equivalents in which the kanji string generated by the kanji string conversion unit 27 is written in the font determined by the font determination unit 26.SELECTED DRAWING: Figure 2
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