The additional five sounds to the "ngalagena" characters were added to fulfill the purpose of Sundanese script as tool for recording the development of Sundanese language, especially by absorption of foreign words and sounds. However, the glyphs for the new characters are not new, but reusing several variants in old Sundanese script, for example: the glyphs for "fa" and "va" are variants of Old Sundanese "pa", the glyphs for "qa" and "xa" are variants of Old Sundanese "ka", and the glyph for "za" is a variant of Old Sundanese "ja".