Terran is a language spoken by earth elementals hailing from Deepholm. It is also known by conglomerates with the sub-type of earth.[1] It is perhaps a dialect of Kalimag.
The term "Terran" shows up in the Kalimag phrase, "Ter'ran" in the Kalimag language parser.
Speculation

"Terran" has an apparent connection to DnD derived generic languages which apparently can be found in DnD rule books.
References
- ^ Shadows & Light, pg. 143
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