diff --git a/dev/detectduplicatelangkey.sh b/dev/detectduplicatelangkey.sh
new file mode 100755
index 0000000000000000000000000000000000000000..06d9cd8a69e66459974cf7fc67b4d49989c93043
--- /dev/null
+++ b/dev/detectduplicatelangkey.sh
@@ -0,0 +1,21 @@
+#!/bin/sh
+# Helps find duplicate translation keys in language files
+#
+# Copyright (C) 2014 Raphaël Doursenaud - rdoursenaud@gpcsolutions.fr
+
+for file in `find . -type f`
+do
+    dupes=$(
+    sed "s/^\s*//" "$file" | # Remove any leading whitespace
+    sed "s/\s*\=/=/" | # Remove any whitespace before =
+    grep -Po "(^.*?)=" | # Non greedeely match everything before =
+    sed "s/\=//" | # Remove trailing = so we get the key
+    sort | uniq -d # Find duplicates
+    )
+
+    if [ -n "$dupes" ]
+    then
+        echo "Duplicates found in $file"
+        echo "$dupes"
+    fi
+done