diff --git a/src/lang/english.txt b/src/lang/english.txt
--- a/src/lang/english.txt
+++ b/src/lang/english.txt
@@ -1761,6 +1761,7 @@ STR_INTRO_TOOLTIP_ONLINE_CONTENT        
 STR_INTRO_TOOLTIP_SCRIPT_SETTINGS                               :{BLACK}Display AI/Game script settings
 STR_INTRO_TOOLTIP_QUIT                                          :{BLACK}Exit 'OpenTTD'
 
+STR_INTRO_BASESET                                               :{BLACK}The currently selected base graphics set is missing {NUM} sprite{P "" s}. Please check for updates for the baseset.
 STR_INTRO_TRANSLATION                                           :{BLACK}This translation misses {NUM} string{P "" s}. Please help make OpenTTD better by signing up as translator. See readme.txt for details.
 
 # Quit window
@@ -2907,8 +2908,6 @@ STR_NEWGRF_ERROR_INVALID_ID             
 STR_NEWGRF_ERROR_CORRUPT_SPRITE                                 :{YELLOW}{RAW_STRING} contains a corrupt sprite. All corrupt sprites will be shown as a red question mark (?)
 STR_NEWGRF_ERROR_MULTIPLE_ACTION_8                              :Contains multiple Action 8 entries (sprite {3:NUM})
 STR_NEWGRF_ERROR_READ_BOUNDS                                    :Read past end of pseudo-sprite (sprite {3:NUM})
-STR_NEWGRF_ERROR_MISSING_SPRITES                                :{WHITE}The currently used base graphics set is missing a number of sprites.{}Please update the base graphics set
-STR_NEWGRF_ERROR_MISSING_SPRITES_UNSTABLE                       :{WHITE}The currently used base graphics set is missing a number of sprites.{}Please update the base graphics set.{}Since you are playing a {YELLOW}development snapshot of OpenTTD{WHITE}, you might also need a {YELLOW}development snapshot of the base graphics{WHITE}
 STR_NEWGRF_ERROR_GRM_FAILED                                     :Requested GRF resources not available (sprite {3:NUM})
 STR_NEWGRF_ERROR_FORCEFULLY_DISABLED                            :{1:RAW_STRING} was disabled by {2:RAW_STRING}
 STR_NEWGRF_ERROR_INVALID_SPRITE_LAYOUT                          :Invalid/unknown sprite layout format (sprite {3:NUM})