Added a script to check all language files for missing translations

Marlin/scripts/findMissingTranslations.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+IGNORE_DEFINES="LANGUAGE_EN_H MAPPER_NON SIMULATE_ROMFONT DISPLAY_CHARSET_ISO10646_1 MSG_H1 MSG_H2 MSG_H3 MSG_H4 MSG_MOVE_E1 MSG_MOVE_E2 MSG_MOVE_E3 MSG_MOVE_E4 MSG_N1 MSG_N2 MSG_N3 MSG_N4 MSG_DIAM_E1 MSG_DIAM_E2 MSG_DIAM_E3 MSG_DIAM_E4 MSG_E1 MSG_E2 MSG_E3 MSG_E4"
+
+for i in `awk '/#define/{print $2}' language_en.h`; do
+  for j in `ls language_*.h | grep -v language_en.h`; do
+    t=$(grep -c "${i}" ${j})
+    if [ "$t" -eq 0 ]; then
+      for k in ${IGNORE_DEFINES}; do
+        [ "${k}" == "${i}" ] && continue 2;
+      done
+      echo "${j},${i}"
+    fi
+  done
+done