Zmee have three languages that operate independently, two of which are vocal — Zmiysh (Low form) & Zmeezh (High form).
The third is non-vocal, and is formed of the facial tendrils of adults, whose subtle movements appear meaningless to outsiders. This tertiary language springs as much from the coloring of these tendrils, and conveys such nuances as importance, urgency, extent, ambivalence, and a gamut of emotions. Adult Zmee default to non-vocal communication, and therefore give the impression to outsiders of being passionless and inexpressive.
Owing to the construction of their palate, as well as to their almost invisible ears, there are many sounds Zmee cannot make or differentiate; likewise, there are many sounds they make which are too subtle for outsiders to distinguish.
In Low Zmiysh all word forms are age-less, class-less, and gender-less; whereas in High Zmeezh, the opposite is true. The Low form is used only when communicating with one’s equals, and the High when addressing one’s superiors or for public broadcast.