| Zamenhof | a | b | c | ĉ | d | e | f | g | ĝ | h | ĥ | i | j | ĵ | k | l | m | n | o | p | r | s | ŝ | t | u | ŭ | v | z |
| x-sistemo | a | b | c | cx | d | e | f | g | gx | h | hx | i | j | ĵ | k | l | m | n | o | p | r | s | sx | t | u | ux | v | z |
| IPA | ä | b | t͡s | t͡ʃ | d | e̞ | f | ɡ | d͡ʒ | h | x | i | j, i̯ | ʒ | k | l | m | n | o̞ | p | r | s | ʃ | t | u | u̯ | v | z |
| ULA-2015 | a | b | ts | tc | d | e | f | ɡ | dy | h | x | i | j | y | k | l | m | n | o | p | r | s | c | t | u | w | v | z |