--- a/tools/README.md	Wed Nov 07 22:01:47 2018 +0300
+++ b/tools/README.md	Wed Nov 07 20:23:30 2018 +0100
@@ -15,6 +15,7 @@
 * `dmg_pkg_install.sh`: Downloads and install a .dmg from a URL (relevant for Mac)
 * `docgen.sh`: Generate QTfrontend documentation with Doxygen (it's not very good)
 * `check_translations.sh`: Check most translation files for mistakes and generate a simple progress report
+* `find_outdated_engine_translations.sh`: Check for strings in engine translations that MIGHT be outdated
 
 ### Directories
 * `hwmapconverter`: C++ application to edit HWMAP files in text form

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/find_outdated_engine_translations.sh	Wed Nov 07 20:23:30 2018 +0100
@@ -0,0 +1,62 @@
+#!/bin/sh -
+#
+# Tool which tries to find outdated translations in the engine strings (*.txt) using hg blame.
+# Note this is only a heuristic; the output might not be 100% accurate.
+# Strings which this tool lists MIGHT be outdated, so you might want to re-translate them, if needed.
+# Run this in the tools/ directory.
+#
+# SYNTAX:
+#
+# ./find_outdated_engine_translations.sh <LANGUAGE>
+#
+# <LANGUAGE>: Language code of the language to check
+#
+
+cd ../share/hedgewars/Data/Locale
+
+BLAMELANG=$1;
+
+if [ -z $BLAMELANG ]
+then
+	echo "No language specified.";
+	exit;
+fi;
+BLAMELANGFILE="$BLAMELANG.txt";
+
+TEMP_EN=$(mktemp);
+TEMP_LANG=$(mktemp);
+
+hg blame en.txt | grep -P "^\s*\d+:\s+0[013-6]:" > $TEMP_EN;
+
+hg blame $BLAMELANGFILE | grep -P "^\s*\d+:\s+0[013-6]:" > $TEMP_LANG;
+
+cat $TEMP_EN | while read f;
+do
+	REV=$(echo $f | sed 's/:.*//');
+	CODE=$(echo $f | sed 's/^[0-9]\+:\s\+//;s/=.*//');
+	OTHER=$(grep -P "^\s*\d+:\s+${CODE}" $TEMP_LANG);
+	if (($?==0));
+	then
+		OTHER_REV=$(echo $OTHER | sed 's/:.*//');
+		if (($REV>$OTHER_REV));
+		then
+			TEXT=$(echo $f | sed 's/^\s*[0-9]\+:\s*[0-9]\+:[0-9]\+=//');
+			OLD_TEXT=$(hg grep --all -r "1:$OTHER_REV" "$CODE" en.txt | tail -n1 | sed 's/.*en.txt:[0-9]\+:[+-]:[0-9]\+:[0-9]\+=//;s/^M//');
+			if [ "$TEXT" != "$OLD_TEXT" ];
+			then
+				if [ -z $COLUMNS ];
+				then
+					printf '━%.0s' $(seq 74);
+					echo "";
+				else
+					printf '━%.0s' $(seq $COLUMNS);
+				fi;
+				echo "$TEXT ← Current English";
+				echo "$OLD_TEXT ← English at time of translation";
+				echo "$(echo $OTHER | sed 's/^\s*[0-9]\+:\s*[0-9]\{2\}:[0-9]\{2\}=//') ← current translation";
+			fi;
+		fi;
+	fi;
+done
+
+rm $TEMP_EN $TEMP_LANG