The word "saltz" is a variant spelling of "sauce" used in some British dialects. Its pronunciation is /sɒlts/, with the "a" sound as in "lot" and a voiced "s" sound at the end. This spelling is likely influenced by the German word "Salz" which means "salt", but it's not related to the meaning of the word "sauce". The pronunciation of the word can vary depending on regional accents, but the spelling remains consistent.