https://github.com/wesnoth/wesnoth/pull/3473#discussion_r211090169

(cherry picked from commit bc52143)

(cherry-picked from commit c97fe98)

data/campaigns/Heir_To_The_Throne/scenarios/17_Scepter_of_Fire.cfg

@@ -633,7 +633,8 @@
             [then]
                 [message]
                     race=dwarf
-                    message=_ "Lord Konrad, yon rumble was made by nae enemy o’ us. ’Tis the echoes of the very bedrock witherin’ and crumbling beneath us that we ’eard. Are ye nae feeling the heat redoubling? Is yer breath nae difficult for the air, sowled by ashes? I beseech that we not tarry ’ere any more than we ha’ to, lest the forming abysses claim us."
+                    # po: "sowl" is a rare word synonymous with "sully", meaning "contaminate". 
+                    message=_ "Lord Konrad, yon rumble was made by nae enemy o’ us. ’Tis the echoes of the very bedrock witherin’ and crumbling beneath us that we ’eard. Are ye nae feeling the heat redoubling? Is yer breath nae difficult for the ashes sowling the air? I beseech that we not tarry ’ere any more than we ha’ to, lest the forming abysses claim us."
                 [/message]
             [/then]
             [elseif]