diff --git a/src/lang/english.txt b/src/lang/english.txt
--- a/src/lang/english.txt
+++ b/src/lang/english.txt
@@ -1543,6 +1543,9 @@ STR_CONFIG_ERROR_INVALID_GRF_INCOMPATIBL
 STR_CONFIG_ERROR_INVALID_GRF_UNKNOWN                            :unknown
 STR_CONFIG_ERROR_INVALID_SAVEGAME_COMPRESSION_LEVEL             :{WHITE}... compression level '{RAW_STRING}' is not valid
 STR_CONFIG_ERROR_INVALID_SAVEGAME_COMPRESSION_ALGORITHM         :{WHITE}... savegame format '{RAW_STRING}' is not available. Reverting to '{RAW_STRING}'
+STR_CONFIG_ERROR_INVALID_BASE_GRAPHICS_NOT_FOUND                :{WHITE}... ignoring Base Graphics set '{RAW_STRING}': not found
+STR_CONFIG_ERROR_INVALID_BASE_SOUNDS_NOT_FOUND                  :{WHITE}... ignoring Base Sounds set '{RAW_STRING}': not found
+STR_CONFIG_ERROR_INVALID_BASE_MUSIC_NOT_FOUND                   :{WHITE}... ignoring Base Music set '{RAW_STRING}': not found
 
 # Intro window
 STR_INTRO_CAPTION                                               :{WHITE}OpenTTD {REV}