Please add the language code non (English: Old Norse, Old Norse: dǫnsk tunga or norrœnt mál) to the list of language codes supported for monolingual text values.
The script is Latin script, including eth (Ð, ð), thorn (Þ, þ), o caudata (Ǫ, ǫ), oethel (Œ, œ) and maybe elle (Ꝇ, ꝇ) and vend (Ꝩ, ꝩ). For a full explanation of the ortography, see: https://en.wikipedia.org/wiki/Old_Norse_orthography
Usage example: https://www.wikidata.org/w/index.php?title=Q43610&diff=344302194&oldid=341194375