Please add the language code ess to the list of language codes supported for monolingual text values. This is known on English Wikipedia as Central Siberian Yupik, not to be confused with Central Yupik, although the state of Alaska government calls it St. Lawrence Island Yupik. It is an official language of Alaska and as such there is quite a bit of documentation in and about the language that would be good to represent on Wikimedia projects. There are also some speakers in Russia on the other side of the Bering Strait.

Usage example:
On the language item: https://www.wikidata.org/wiki/Q27993
On the Alaska Poppy item: https://www.wikidata.org/wiki/Q21384059
On the lingoberry item: https://www.wikidata.org/wiki/Q93235

Please allow this to be used in the Wikidata termbox and lexemes as well; as I understand it this is possible if added correctly.