Where does “sötsur sås” come from?

sötsur sås (Swedish) comes from Swedish sås, from French sauce, from Old French sause, from Vulgar Latin salsa, from Latin salsus, from Latin sāl, from Proto-Italic sāls, from Proto-Indo-European *sḗh₂l — salt.

sötsur sås (Swedish): sweet-and-sour sauce

Definitions

sweet-and-sour sauce

Ancestry of “sötsur sås”, step by step

sötsur sås traces back through two separate lines of ancestry.

via Swedish sås

Step	Language	Word	Meaning
1	Swedish	sås	gravy; sauce; semen
2	French	sauce	sauce
3	Old French	sause	sauce (condiment)
4	Vulgar Latin	salsa	nominative feminine singular of salsus;...
5	Latin	salsus	salty, briny; salted; witty
6	Latin	sāl	salt
7	Proto-Italic	sāls	salt
8	Proto-Indo-European	*sḗh₂l	salt

via Swedish sötsur

Step	Language	Word	Meaning
1	Swedish	sötsur	sweet-and-sour
2	Swedish	söt	sweet; of the taste of sugar; sweet; not salty;...
3	Old Swedish	söter	sweet
4	Old Norse	sœtr	sweet
5	Proto-Germanic	swōtuz	sweet
6	Proto-Indo-European	swéh₂dus	sweet
7	Proto-Indo-European	sweh₂d-	sweet

Every word from Proto-Indo-European *sḗh₂l →Every word from Proto-Italic sāls →Every word from Latin sāl →