diff --git a/F-Droid/tools/check-string-format.py b/F-Droid/tools/check-string-format.py
new file mode 100755
index 000000000..867090385
--- /dev/null
+++ b/F-Droid/tools/check-string-format.py
@@ -0,0 +1,37 @@
+#!/usr/bin/env python2
+
+# Remove extra translations
+
+import glob
+import os
+import sys
+import re
+from xml.etree import ElementTree
+
+formatRe = re.compile(r'(%%|%[^%](\$.)?)')
+
+validFormatRe = re.compile(r'^(%%|%[sd]|%[0-9]\$[sd])$')
+
+count = 0
+
+for d in glob.glob(os.path.join('res', 'values-*')):
+
+    str_path = os.path.join(d, 'strings.xml')
+    if not os.path.exists(str_path):
+        continue
+
+    tree = ElementTree.parse(str_path)
+    root = tree.getroot()
+
+    for e in root.findall('.//string'):
+        for m in formatRe.finditer(e.text):
+            s = m.group(0)
+            if validFormatRe.match(s):
+                continue
+            count += 1
+            print('%s: Invalid format "%s" in "%s"' % (str_path, s, e.text))
+
+if count > 0:
+    print("%d misformatted strings found!" % count)
+    sys.exit(1)
+