diff --git a/source/tools/i18n/checkTranslationsForSpam.py b/source/tools/i18n/checkTranslationsForSpam.py
new file mode 100644
index 0000000000..a5ccaaf2d1
--- /dev/null
+++ b/source/tools/i18n/checkTranslationsForSpam.py
@@ -0,0 +1,141 @@
+#!/usr/bin/env python
+# -*- coding:utf-8 -*-
+#
+# Copyright (C) 2013 Wildfire Games.
+# This file is part of 0 A.D.
+#
+# 0 A.D. is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
+#
+# 0 A.D. is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
+
+from __future__ import absolute_import, division, print_function, unicode_literals
+
+import codecs, os, re, sys
+
+from potter.catalog import Catalog, Message
+from potter.extract import getExtractorInstance
+from potter.pofile import read_po, write_po
+
+
+l10nToolsDirectory = os.path.dirname(os.path.realpath(__file__))
+projectRootDirectory = os.path.abspath(os.path.join(l10nToolsDirectory, os.pardir, os.pardir, os.pardir))
+l10nFolderName = "l10n"
+
+
+#def getAverageExpansionForEnglishString(string):
+    #"""
+        #Based on http://www.w3.org/International/articles/article-text-size.en
+    #"""
+    #length = len(string)
+    #if len <= 10:
+        #return length*3     # 200–300%
+    #if len <= 20:
+        #return length*2     # 180–200%
+    #if len <= 30:
+        #return length*1.8   # 160–180%
+    #if len <= 50:
+        #return length*1.6   # 140–160%
+    #if len <= 70:
+        #return length*1.7   # 151-170%
+
+    #return length*1.3       # 130%
+
+
+#def enlarge(string, surroundWithSpaces):
+    #halfExpansion = int(getAverageExpansionForEnglishString(string)/2)
+    #if surroundWithSpaces: halfExpansion -= 1
+
+    #outputString = "x"*halfExpansion
+    #if surroundWithSpaces:
+        #outputString += " "
+
+    #outputString += string
+
+    #if surroundWithSpaces:
+        #outputString += " "
+    #outputString += "x"*halfExpansion
+
+    #return outputString
+
+
+def checkTranslationsForSpam(inputFilePath):
+
+    with codecs.open(inputFilePath, 'r', 'utf-8') as fileObject:
+        templateCatalog = read_po(fileObject)
+
+    longStringCatalog = Catalog()
+
+    # If language codes were specified on the command line, filder by those.
+    filters = sys.argv[1:]
+
+    # Load existing translation catalogs.
+    existingTranslationCatalogs = []
+    l10nFolderPath = os.path.dirname(inputFilePath)
+
+    # .pot is one letter longer than .po, but the dot that separates the locale
+    # code from the rest of the filename in .po files makes up for that.
+    charactersToSkip = len(os.path.basename(inputFilePath))
+
+    for filename in os.listdir(l10nFolderPath):
+        if len(filename) > 3 and filename[-3:] == ".po" and filename[:4] != "long":
+            if not filters or filename[:-charactersToSkip] in filters:
+                with codecs.open(os.path.join(l10nFolderPath, filename), 'r', 'utf-8') as fileObject:
+                    existingTranslationCatalogs.append([filename[:-charactersToSkip], read_po(fileObject)])
+
+    urlPattern = re.compile(u"http[s]?://(?:[a-zA-Z]|[0-9]|[$-_@.&+]|[!*\(\),]|(?:%[0-9a-fA-F][0-9a-fA-F]))+")
+
+    # Check the URLs in translations against the URLs in the translation template.
+    for languageCode, translationCatalog in existingTranslationCatalogs:
+        for templateMessage in templateCatalog:
+            translationMessage = translationCatalog.get(templateMessage.id, templateMessage.context)
+            if translationMessage:
+                if templateMessage.pluralizable:
+                    templateSingularString, templatePluralString = templateMessage.id
+                    templateUrls = urlPattern.findall(templateSingularString) # We assume that the same URL is used in both the plural and singular forms.
+                    for translationString in translationMessage.string:
+                        translationUrls = urlPattern.findall(translationString)
+                        for translationUrl in translationUrls:
+                            if translationUrl not in templateUrls:
+                                print(u"{}: Found the “{}” URL in the translation, which does not match any of the URLs in the translation template: {}".format(
+                                        languageCode,
+                                        translationUrl,
+                                        u", ".join(templateUrls)))
+                else:
+                    templateUrls = urlPattern.findall(templateMessage.id)
+                    translationUrls = urlPattern.findall(translationMessage.string)
+                    for translationUrl in translationUrls:
+                        if translationUrl not in templateUrls:
+                            print(u"{}: Found the “{}” URL in the translation, which does not match any of the URLs in the translation template: {}".format(
+                                    languageCode,
+                                    translationUrl,
+                                    u", ".join(templateUrls)))
+
+
+def main():
+
+    print(u"\n    WARNING: Remember to regenerate the POT files with “updateTemplates.py” before you run this script.\n    POT files are not in the repository.\n")
+
+    foundPots = 0
+    for root, folders, filenames in os.walk(projectRootDirectory):
+        root = root.decode("utf-8")
+        for filename in filenames:
+            if len(filename) > 4 and filename[-4:] == ".pot" and os.path.basename(root) == "l10n":
+                foundPots += 1
+                checkTranslationsForSpam(os.path.join(root, filename))
+    if foundPots == 0:
+        print(u"This script did not work because no ‘.pot’ files were found.")
+        print(u"Please, run ‘updateTemplates.py’ to generate the ‘.pot’ files, and run ‘pullTranslations.py’ to pull the latest translations from Transifex.")
+        print(u"Then you can run this script to generate ‘.po’ files with the longest strings.")
+
+
+if __name__ == "__main__":
+    main()