Multiple realities
(covers information from several alternate timelines)
In linguistics and exolinguistics, phonology was an in-depth study of the system or pattern of speech sounds used in a particular language or in language in general.
Nyota Uhura studied phonology during her time at Starfleet Academy. In 2255, James T. Kirk included morphology, along with morphology and syntax, in his description of what xenolinguistics entailed, proving to Nyota Uhura that he wasn't the dumb hick she believed him to be. (Star Trek)
Hoshi Sato was also experienced in the field of phonology, having once noted that the frequency distortions of a symbiotic lifeform found aboard Enterprise shared a similar phonetic pattern to that found in certain Andorian dialects. (ENT: "Vox Sola")