This letter is followed by "h-o-s-a" in the name of a prominent click language spoken in South Africa.
This letter appears after the hyphen in the name of a constructed language that Kenneth Pike devised to teach the "art of translation." In the 1980s, a theory named for this letter was extended by government and binding theory. In the IPA, this letter represents a voiceless velar fricative. Noam Chomsky argued that all languages share the same underlying binary-branching structure, in which intermediate nodes of a phrase are symbolized by an apostrophe or a line over a letter; that theory is named for (*)  "bar" and this letter. This letter is followed by "h-o-s-a" in the name of a prominent click language spoken in South Africa. In Pinyin, this letter represents the "sh" sound in words such as Xinjiang  (sheen-jyong) . It derives from the Greek letter chi  (kye) . For 10 points, name this twenty-fourth letter of the English alphabet.
This letter appears after the hyphen in the name of a constructed language that Kenneth Pike devised to teach the "art of translation.
 X  [accept Kalaba- X  or  X -bar theory]