Chinese, Japanese, Korean. These three languages require fonts with a huge number of glyphs. All three share a writing system based on Chinese ideographs (though they have undergone separate evolution in each country, indeed mainland Chinese fonts are different from those used in Taiwan and Hong Kong).Japanese and Korean also have phonetic syllabaries. The Japanese have two syllabaries, Hiragana and katakana which have about 60 syllables. The Koreans have one syllabary, hangul with tens of thousands of syllables.
Font Forge Glossary