eszperente

Etymology
From, by changing all vowels to e. Coined by Frigyes Karinthy (Hungarian poet and humorist of the early 20th century).

Noun

 * 1) a Hungarian-language game in which only the vowel e is allowed to be used but one must still speak correct Hungarian.

Adjective

 * 1) following the rules of the eszperente game (of a word, sentence or other text)