More salvage fixes (#15618)

Resources/Locale/en-US/procedural/expeditions.ftl

@@ -1,5 +1,8 @@
 salvage-expedition-structure-examine = This is a [color=#B02E26]destruction[/color] objective
-salvage-expedition-structure-remaining = {$count} structures remaining.
+salvage-expedition-structure-remaining = {$count ->
+    [one] {$count} structure remaining.
+    *[other] {$count} structures remaining.
+}
 
 salvage-expedition-window-title = Salvage expeditions
 salvage-expedition-window-difficulty = Difficulty:
@@ -18,12 +21,15 @@ salvage-expedition-window-next = Next offer
 # Expedition descriptions
 salvage-expedition-desc-mining = Collect resources inside the area.
 #  You will be taxed {$tax}% of the resources collected.
-salvage-expedition-desc-structure = Destroy {$count} {$structure} inside the area.
+salvage-expedition-desc-structure = {$count ->
+    [one] Destroy {$count} {$structure} inside the area.
+    *[other] Destroy {$count} {$structure}s inside the area.
+}
 
 salvage-expedition-type-Mining = Mining
 salvage-expedition-type-Destruction = Destruction
 
-salvage-expedition-difficulty-None = Minimal
+salvage-expedition-difficulty-Minimal = Minimal
 salvage-expedition-difficulty-Minor = Minor
 salvage-expedition-difficulty-Moderate = Moderate
 salvage-expedition-difficulty-Hazardous = Hazardous
@@ -33,3 +39,4 @@ salvage-expedition-difficulty-Extreme = Extreme
 salvage-expedition-announcement-countdown-minutes = {$duration} minutes remaining to complete the expedition.
 salvage-expedition-announcement-countdown-seconds = {$duration} seconds remaining to complete the expedition.
 salvage-expedition-announcement-dungeon = Dungeon is located {$direction}.
+salvage-expedition-completed = Expedition is completed.