diff -r 6ff01dc1ffe2 -r 877f55c77a3f share/hedgewars/Data/Missions/Challenge/User_Mission_-_RCPlane_Challenge.lua
--- a/share/hedgewars/Data/Missions/Challenge/User_Mission_-_RCPlane_Challenge.lua	Wed Apr 26 22:31:29 2017 +0200
+++ b/share/hedgewars/Data/Missions/Challenge/User_Mission_-_RCPlane_Challenge.lua	Wed Apr 26 23:05:05 2017 +0200
@@ -466,7 +466,7 @@
 			end
 			if(planesUsed == 1) then
 				SendStat(siCustomAchievement, loc("Congratulations! You have truly mastered this challenge! Don't forget to save the demo."))
-				SendStat(siCustomAchievement, string.format(loc("You have gained an achievement: %s"), loc("Prestigious Pilot")))
+				SendStat(siCustomAchievement, string.format(loc("Achievement gotten: %s"), loc("Prestigious Pilot")))
 			end
 
 			ShowMission     (