diff --git a/patacrep/authors.py b/patacrep/authors.py
index 94e07f92..a451859f 100644
--- a/patacrep/authors.py
+++ b/patacrep/authors.py
@@ -23,11 +23,11 @@ def compile_authwords(authwords):
 
     # Compilation
     authwords['after'] = [
-            re.compile(r"^.*%s\b(.*)" % word)
+            re.compile(r"^.*\b%s\b(.*)$" % word, re.LOCALE)
             for word in authwords['after']
             ]
     authwords['sep'] = [
-            re.compile(r"^(.*)%s (.*)$" % word)
+            re.compile(r"^(.*)%s +(.*)$" % word, re.LOCALE)
             for word in ([" %s" % word for word in authwords['sep']] + [','])
             ]
 
diff --git a/patacrep/index.py b/patacrep/index.py
index cd83668e..9ee5e99d 100755
--- a/patacrep/index.py
+++ b/patacrep/index.py
@@ -19,8 +19,8 @@ from patacrep.plastex import simpleparse
 EOL = u"\n"
 
 # Pattern set to ignore latex command in title prefix
-KEYWORD_PATTERN = re.compile(r"^%(\w+)\s?(.*)$")
-FIRST_LETTER_PATTERN = re.compile(r"^(?:\{?\\\w+\}?)*[^\w]*(\w)")
+KEYWORD_PATTERN = re.compile(r"^%(\w+)\s?(.*)$", re.LOCALE)
+FIRST_LETTER_PATTERN = re.compile(r"^(?:\{?\\\w+\}?)*[^\w]*(\w)", re.LOCALE)
 
 
 def sortkey(value):
@@ -98,7 +98,8 @@ class Index(object):
             if 'prefix' in self.keywords:
                 for prefix in self.keywords['prefix']:
                     self.prefix_patterns.append(re.compile(
-                            r"^({prefix})(\b|\\)(\s*.*)$".format(prefix=prefix)
+                            r"^({prefix})(\b|\\)(\s*.*)$".format(prefix=prefix),
+                            re.LOCALE
                             ))
 
         if self.indextype == "AUTHOR":
diff --git a/patacrep/songs.py b/patacrep/songs.py
index 66ea2ad2..d62cbe64 100755
--- a/patacrep/songs.py
+++ b/patacrep/songs.py
@@ -43,7 +43,7 @@ def unprefixed_title(title, prefixes):
     """Remove the first prefix of the list in the beginning of title (if any).
     """
     for prefix in prefixes:
-        match = re.compile(r"^(%s)\b\s*(.*)$" % prefix).match(title)
+        match = re.compile(r"^(%s)\b\s*(.*)$" % prefix, re.LOCALE).match(title)
         if match:
             return match.group(2)
     return title