Add a translation note.

data/campaigns/Descent_Into_Darkness/scenarios/01_Saving_Parthyn.cfg

@@ -15,6 +15,8 @@
 
     # wmllint: local spellings stewpots
     [story]
+        #po: If the target language has a specialized term for a fortified town,
+        #po: like Latin "oppidum", use it for Parthyn.
         [part]
             story=_ "Malin Keshar was born ten years after the death of Haldric IV. He grew up in the northern border town of Parthyn, the second child and eldest son of the baron of the city. Every summer when the mountain passes became clear, orcs came down from the north to prove themselves in battle. Every year Parthyn's guards repelled the raids, though some of the townsfolk were always lost. Malin's father led raiding parties to disrupt the orc encampments and send the orcs back to the north."
             background=story/parthyn.jpg