Esperanto
One of the common criticisms from both non-Esperanto-speakers and those who speak Esperanto, is that there is language sexism in Esperanto. Some words by default refer to males, and the feminine counterparts have to be constructed by adding the -in- suffix to the masculine root. Such a words are words like  (father) and  (mother),  (son) and  (daughter),  (uncle) and  (aunt), and so on. The majority of all Esperanto words have no specific meaning on the basis of sex. Some people proposed the suffix -iĉ- with male meaning in order to make the meaning of the basic word neutral. However this proposal is not widely accepted by Esperanto speakers.