Please add the language code gsw-FR to the list of language codes supported for monolingual text values.
It's a dialect from https://www.wikidata.org/wiki/Q131339
Language names in other languages to add: Alsatian (en) alsacien (fr) Elsässisch (de) // Elzassisch (nl) (see WD)
Usage example: street names in Alsace region eg https://www.wikidata.org/wiki/Q3390470#P1705
Might be useful too in lexèmes