Esperanto
Some peoplesay that use of the diacritics (the letters ĉ, ĝ, ĥ, ĵ, ŝ, ŭ) make the language less neutral than it would be using only the basic letters of Latin alphabet. No other language uses the letters ĉ, ĥ and ĵ. The letter ĥ is the least used letter in Esperanto and ĵ is not used frequently either, leading people to question how necessary they are.