diff --git a/html-src/gen-html.py b/html-src/gen-html.py
index 1b7174bd..b567b8c8 100755
--- a/html-src/gen-html.py
+++ b/html-src/gen-html.py
@@ -2,13 +2,12 @@
 
 import sys
 import os
-import re
 import builtins
 from pysollib.mygettext import fix_gettext
 
 from pysollib.gamedb import GAME_DB
 from pysollib.gamedb import GI
-from pysollib.mfxutil import latin1_to_ascii
+from pysollib.mfxutil import latin1_normalize
 # outdir = '../html'
 pysollib_dir = '../'
 
@@ -129,11 +128,7 @@ alink="#FF0000">
 def getGameRulesFilename(n):
     if n.startswith('Mahjongg'):
         return 'mahjongg.html'
-    # n = re.sub(r"[\[\(].*$", "", n)
-    n = latin1_to_ascii(n)
-    n = re.sub(r"[^\w]", "", n)
-    n = n.lower() + ".html"
-    return n
+    return latin1_normalize(n) + '.html'
 
 
 def gen_main_html():
diff --git a/pysollib/app.py b/pysollib/app.py
index ef88cb94..15ca4976 100644
--- a/pysollib/app.py
+++ b/pysollib/app.py
@@ -31,7 +31,7 @@ import traceback
 from pysollib.mfxutil import destruct, Struct
 from pysollib.mfxutil import pickle, unpickle, UnpicklingError
 from pysollib.mfxutil import getusername, getprefdir
-from pysollib.mfxutil import latin1_to_ascii, print_err
+from pysollib.mfxutil import latin1_normalize, print_err
 from pysollib.mfxutil import USE_PIL
 from pysollib.util import CARDSET, IMAGE_EXTENSIONS
 from pysollib.settings import PACKAGE, VERSION_TUPLE, WIN_SYSTEM
@@ -1257,16 +1257,13 @@ Please select a %s type %s.
             return None
         return gi.short_name
 
-    def _calcGameFn(self, n):
-        return re.sub(r"[^\w]", "", latin1_to_ascii(n).lower())
-
     def getGameRulesFilename(self, id):
         gi = self.gdb.get(id)
         if gi is None:
             return None
         if gi.rules_filename is not None:
             return gi.rules_filename
-        n = self._calcGameFn(gi.en_name) + '.html'        # english name
+        n = latin1_normalize(gi.en_name) + '.html'        # english name
         f = os.path.join(self.dataloader.dir, "html", "rules", n)
         if not os.path.exists(f):
             n = ''
@@ -1279,7 +1276,7 @@ Please select a %s type %s.
         n = self.gdb.get(id).en_name                  # english name
         if not n:
             return None
-        return re.sub(r"[\s]", "_", self._calcGameFn(n))
+        return re.sub(r"[\s]", "_", latin1_normalize(n))
 
     def getRandomGameId(self, games=None):
         if games is None:
diff --git a/pysollib/mfxutil.py b/pysollib/mfxutil.py
index 41540930..1a4a0e4a 100644
--- a/pysollib/mfxutil.py
+++ b/pysollib/mfxutil.py
@@ -22,6 +22,7 @@
 # ---------------------------------------------------------------------------##
 
 # imports
+import re
 import sys
 import os
 import time
@@ -79,13 +80,16 @@ def latin1_to_ascii(n):
     # return n
     n = n.encode('iso8859-1', 'replace')
     # FIXME: rewrite this for better speed
-    n = (n.replace("\xc4", "Ae")
+    return (n.replace("\xc4", "Ae")
          .replace("\xd6", "Oe")
          .replace("\xdc", "Ue")
          .replace("\xe4", "ae")
          .replace("\xf6", "oe")
          .replace("\xfc", "ue"))
-    return n
+
+
+def latin1_normalize(n):
+    return re.sub(r"[^\w]", "", latin1_to_ascii(n).lower())
 
 
 def format_time(t):
diff --git a/pysollib/resource.py b/pysollib/resource.py
index 523c20cf..e139bd1a 100644
--- a/pysollib/resource.py
+++ b/pysollib/resource.py
@@ -58,7 +58,6 @@ class Resource(Struct):
 
     def getSortKey(self):
         return self.name.lower()
-        # return latin1_to_ascii(self.name).lower()
 
 
 class ResourceManager:
diff --git a/scripts/all_games.py b/scripts/all_games.py
index 4f4e5bed..9905261c 100755
--- a/scripts/all_games.py
+++ b/scripts/all_games.py
@@ -4,7 +4,6 @@
 
 import sys
 import os
-import re
 import time
 # from pprint import pprint
 import __builtin__
@@ -34,11 +33,7 @@ fix_gettext()
 def getGameRulesFilename(n):
     if n.startswith('Mahjongg'):
         return 'mahjongg.html'
-    # n = re.sub(r"[\[\(].*$", "", n)
-    n = latin1_to_ascii(n)
-    n = re.sub(r"[^\w]", "", n)
-    n = n.lower() + ".html"
-    return n
+    return latin1_normalize(n) + '.html'
 
 
 GAME_BY_TYPE = {