diff --git a/parse.py b/parse.py
deleted file mode 100755
index de007762..00000000
--- a/parse.py
+++ /dev/null
@@ -1,16 +0,0 @@
-#!/usr/bin/env python
-# -*- coding: utf-8 -*-
-
-FILENAME = "naheulbeuk.tex"
-
-import plasTeX
-from plasTeX.TeX import TeX
-
-doc = TeX(file = FILENAME).parse()
-
-language_list = set()
-for node in doc.allChildNodes:
-    if node.nodeName == "selectlanguage":
-        language_list.add(node.argSource)
-
-print language_list
diff --git a/songbook.py b/songbook.py
index 1a96d00b..8851509a 100755
--- a/songbook.py
+++ b/songbook.py
@@ -12,17 +12,20 @@ import locale
 import platform
 
 from utils.utils import recursiveFind
+from utils.plastex import parsetex
 
 reTitle  = re.compile('(?<=beginsong\\{)(.(?<!\\}]))+')
 reArtist = re.compile('(?<=by=)(.(?<![,\\]\\}]))+')
 reAlbum  = re.compile('(?<=album=)(.(?<![,\\]\\}]))+')
 
 class Song:
-    def __init__(self, title, artist, album, path):
+    def __init__(self, title, artist, album, path, languages):
         self.title  = title
         self.artist = artist
         self.album  = album
         self.path   = path
+        self.languages = languages
+
     def __repr__(self):
         return repr((self.title, self.artist, self.album, self.path))
 
@@ -71,7 +74,7 @@ class SongsList:
 
     def append(self, filename):
         """Ajout d'une chanson à la liste
-        
+
         Effets de bord : analyse syntaxique plus ou moins sommaire du fichier
         pour en extraire et traiter certaines information (titre, langue,
         album, etc.).
@@ -86,7 +89,11 @@ class SongsList:
                 album = match.group(0)
             else:
                 album = ''
-            self.songs.append(Song(title, artist, album, path))
+
+            # Exécution de PlasTeX
+            data = parsetex(path)
+
+            self.songs.append(Song(title, artist, album, path, **data))
 
     def append_list(self, filelist):
         """Ajoute une liste de chansons à la liste
@@ -113,6 +120,10 @@ class SongsList:
         result = [ '\\input{{{0}}}'.format(song.path.replace("\\","/").strip()) for song in self.songs ]
         return '\n'.join(result)
 
+    def languages(self):
+        """Renvoie la liste des langues utilisées par les chansons"""
+        return set().union(*[set(song.languages) for song in self.songs])
+
 def parseTemplate(template):
     embeddedJsonPattern = re.compile(r"^%%:")
     f = open(template)
@@ -188,6 +199,8 @@ def makeTexFile(sb, library, output):
     songslist = SongsList(library, prefixes)
     songslist.append_list(songs)
 
+    sb["languages"] = ",".join(songslist.languages())
+
     # output relevant fields
     out = open(output, 'w')
     out.write('%% This file has been automatically generated, do not edit!\n')
diff --git a/templates/ancient.tmpl b/templates/ancient.tmpl
index 9ed78c52..5f11e107 100644
--- a/templates/ancient.tmpl
+++ b/templates/ancient.tmpl
@@ -42,14 +42,17 @@
 %%:  {"name":"mainfontsize", "description":"Font Size", "type":"font", "default":"10"},
 %%:  {"name":"songnumberbgcolor", "description":"Number Shade", "type":"color", "default":"#D1E4AE"},
 %%:  {"name":"notebgcolor", "description":"Note Shade", "type":"color", "default":"#FFFDB3"},
-%%:  {"name":"indexbgcolor", "description":"Index Shade", "type":"color", "default":"#D1E4AE"}
+%%:  {"name":"indexbgcolor", "description":"Index Shade", "type":"color", "default":"#D1E4AE"},
+%%:  {"name":"languages", "description":"List of languages used by songs", "default":""}
 %%:]
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 % begin document
 \makeatletter\def\input@path{{tex/}}
 \documentclass[\getbooktype,\getinstruments,\getbookoptions,\getmainfontsize]{crepbook}
 \usepackage[utf8]{inputenc}
-\usepackage[italian,portuguese,english,spanish,french]{babel}
+\PassOptionsToPackage{\getlanguages}{babel}
+\PassOptionsToPackage{\getlang}{babel}
+\usepackage{babel}
 \usepackage[T1]{fontenc}
 \usepackage{venturisold}
 
diff --git a/templates/minimal.tmpl b/templates/minimal.tmpl
index f029c988..c490eb66 100644
--- a/templates/minimal.tmpl
+++ b/templates/minimal.tmpl
@@ -30,7 +30,8 @@
 %%:  {"name":"instruments", "description":"Instruments", "type":"flag", "values":["guitar","ukulele"], "join":",", "mandatory":true, "default":["guitar"]},
 %%:  {"name":"bookoptions", "description":"Options", "type":"flag", "values":["diagram","importantdiagramonly","lilypond","pictures","tabs","repeatchords","onesongperpage"], "join":",", "mandatory":true, "default":["pictures"]},
 %%:  {"name":"mainfontsize", "description":"Font Size", "type":"font", "default":"10"},
-%%:  {"name":"titleprefixwords", "description":"Ignore some words in the beginning of song titles"}
+%%:  {"name":"titleprefixwords", "description":"Ignore some words in the beginning of song titles"},
+%%:  {"name":"languages", "description":"List of languages used by songs", "default":""}
 %%:]
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 % begin document
@@ -39,7 +40,9 @@
 \usepackage[utf8]{inputenc}
 \usepackage[T1]{fontenc}
 \usepackage{lmodern}
-\usepackage[italian,portuguese,spanish,english,french]{babel}
+\PassOptionsToPackage{\getlanguages}{babel}
+\PassOptionsToPackage{\getlang}{babel}
+\usepackage{babel}
 
 \lang{\getlang}
 \graphicspath{ {img/}, {\getLibraryImgDirectory}, {\getLibraryLilypondDirectory},  {\getCacheDirectory} }
diff --git a/templates/patacrep.tmpl b/templates/patacrep.tmpl
index a14d85ca..bce2ba26 100644
--- a/templates/patacrep.tmpl
+++ b/templates/patacrep.tmpl
@@ -43,7 +43,8 @@
 %%:  {"name":"songnumberbgcolor", "description":"Number Shade", "type":"color", "default":"#D1E4AE"},
 %%:  {"name":"notebgcolor", "description":"Note Shade", "type":"color", "default":"#D1E4AE"},
 %%:  {"name":"indexbgcolor", "description":"Index Shade", "type":"color", "default":"#D1E4AE"},
-%%:  {"name":"titleprefixwords", "description":"Ignore some words in the beginning of song titles"}
+%%:  {"name":"titleprefixwords", "description":"Ignore some words in the beginning of song titles"},
+%%:  {"name":"languages", "description":"List of languages used by songs", "default":""}
 %%:]
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 % begin document
@@ -52,7 +53,10 @@
 \usepackage[utf8]{inputenc}
 \usepackage[T1]{fontenc}
 \usepackage{lmodern}
-\usepackage[italian,portuguese,spanish,english,french]{babel}
+
+\PassOptionsToPackage{\getlanguages}{babel}
+\PassOptionsToPackage{\getlang}{babel}
+\usepackage{babel}
 
 \title{\gettitle}
 \author{\getauthor}
diff --git a/utils/plastex.py b/utils/plastex.py
new file mode 100755
index 00000000..7773546a
--- /dev/null
+++ b/utils/plastex.py
@@ -0,0 +1,31 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import plasTeX
+from plasTeX.TeX import TeX
+
+def parsetex(filename):
+    """Analyse syntaxique d'un fichier .sg
+
+    Renvoie un dictionnaire contenant les métadonnées lues dans le fichier. Les
+    clefs sont :
+    - languages: l'ensemble des langages utilisés (recherche des
+      \selectlanguages{}).
+    """
+    # Chargement du fichier .sg (.tex), et des modules nécessaires
+    tex = TeX(file = filename)
+    tex.disableLogging()
+    tex.ownerDocument.context.loadPackage(tex, "babel")
+
+    # Analyse syntaxique
+    doc= tex.parse()
+
+    # Extraction des données
+    data = {
+            "languages": set(),
+            }
+    for node in doc.allChildNodes:
+        if node.nodeName == "selectlanguage":
+            data["languages"].add(node.argSource)
+
+    return data