Southron appears to be the main language of Karkinor, spoken in both Karkinaroth and in Hurlen. Given it's name, it is likely commonly spoken elsewhere in the south as well. Brier speaks it as well, implying it's spoken it some capacity farther west. It is related to Easternese enough that Jame, who speaks Easternese, can understand some Southron words from their resemblance to Easternese cognates, but is still distant enough that Jame can barely understand the soldiers who accost her in Hurlen.