diff --git a/patacrep/content/song.py b/patacrep/content/song.py
index 4f9ab809..45bbfeac 100755
--- a/patacrep/content/song.py
+++ b/patacrep/content/song.py
@@ -33,6 +33,7 @@ class SongRenderer(Content):
         """Return the string to end a block."""
         return r'\end{songs}'
 
+    #pylint: disable=unused-argument
     def render(self, context):
         """Return the string that will render the song."""
         return textwrap.dedent("""\
@@ -43,7 +44,7 @@ class SongRenderer(Content):
                 """).format(
                     separator="%"*80,
                     path=files.path2posix(self.song.subpath),
-                    song=self.song.render(output=context['filename']),
+                    song=self.song.render(),
                 )
 
     def __lt__(self, other):
diff --git a/patacrep/data/templates/layout.tex b/patacrep/data/templates/layout.tex
index 099772a4..28dba5e8 100644
--- a/patacrep/data/templates/layout.tex
+++ b/patacrep/data/templates/layout.tex
@@ -28,7 +28,7 @@
 \makeatletter
 \def\input@path{ %
     (* for dir in datadir *)
-        {(( path2posix(dir) ))/latex/} %
+        {(( dir | path2posix ))/latex/} %
     (* endfor *)
 }
 \makeatother
diff --git a/patacrep/data/templates/songs.tex b/patacrep/data/templates/songs.tex
index e3562897..da48fdd7 100644
--- a/patacrep/data/templates/songs.tex
+++ b/patacrep/data/templates/songs.tex
@@ -81,15 +81,15 @@
 (( super() ))
 
 (* for lang in _langs|sort -*)
-    \PassOptionsToPackage{(( lang2babel(lang) ))}{babel}
+    \PassOptionsToPackage{(( lang | lang2babel ))}{babel}
 (* endfor *)
-\usepackage[(( lang2babel(lang) ))]{babel}
-\lang{(( lang2babel(lang) ))}
+\usepackage[(( lang | lang2babel ))]{babel}
+\lang{(( lang | lang2babel ))}
 
 \usepackage{graphicx}
 \graphicspath{ %
     (* for dir in datadir *)
-        {(( path2posix(dir) ))/} %
+        {(( dir | path2posix ))/} %
     (* endfor *)
 }
 
diff --git a/patacrep/data/templates/songs/chordpro/latex/song b/patacrep/data/templates/songs/chordpro/latex/song
index e8016107..cb29cc29 100644
--- a/patacrep/data/templates/songs/chordpro/latex/song
+++ b/patacrep/data/templates/songs/chordpro/latex/song
@@ -1,5 +1,5 @@
 (* if lang is defined -*)
-    \selectlanguage{(( lang2babel(lang) ))}
+    \selectlanguage{(( lang | lang2babel ))}
 (* endif *)
 
 (*- if metadata.columns is defined *)
diff --git a/patacrep/songs/__init__.py b/patacrep/songs/__init__.py
index 922ecb00..d19e22df 100644
--- a/patacrep/songs/__init__.py
+++ b/patacrep/songs/__init__.py
@@ -80,7 +80,7 @@ class Song:
 
     # Version format of cached song. Increment this number if we update
     # information stored in cache.
-    CACHE_VERSION = 2
+    CACHE_VERSION = 3
 
     # List of attributes to cache
     cached_attributes = [
@@ -88,7 +88,6 @@ class Song:
         "unprefixed_titles",
         "cached",
         "data",
-        "subpath",
         "lang",
         "authors",
         "_filehash",
@@ -98,44 +97,30 @@ class Song:
     def __init__(self, subpath, config, *, datadir=None):
         if datadir is None:
             self.datadir = ""
+            # Only songs in datadirs may be cached
+            self.use_cache = False
         else:
             self.datadir = datadir
+            self.use_cache = config.get('_cache', False)
+
         self.fullpath = os.path.join(self.datadir, subpath)
+        self.subpath = subpath
+        self._filehash = None
         self.encoding = config["encoding"]
+        self.default_lang = config["lang"]
         self.config = config
 
-        if self.datadir and self.config['_cache']:
-            # Only songs in datadirs are cached
-            self._filehash = hashlib.md5(
-                open(self.fullpath, 'rb').read()
-                ).hexdigest()
-            if os.path.exists(cached_name(datadir, subpath)):
-                try:
-                    cached = pickle.load(open(
-                        cached_name(datadir, subpath),
-                        'rb',
-                        ))
-                    if (
-                            cached['_filehash'] == self._filehash
-                            and cached['_version'] == self.CACHE_VERSION
-                    ):
-                        for attribute in self.cached_attributes:
-                            setattr(self, attribute, cached[attribute])
-                        return
-                except: # pylint: disable=bare-except
-                    LOGGER.warning("Could not use cached version of {}.".format(
-                        self.fullpath
-                        ))
+        if self._cache_retrieved():
+            return
 
         # Data extraction from the latex song
         self.titles = []
         self.data = {}
         self.cached = None
         self.lang = None
-        self._parse(config)
+        self._parse()
 
         # Post processing of data
-        self.subpath = subpath
         self.unprefixed_titles = [
             unprefixed_title(
                 title,
@@ -153,22 +138,52 @@ class Song:
         self._version = self.CACHE_VERSION
         self._write_cache()
 
+    @property
+    def cached_name(self):
+        """Name of the file used for the cache"""
+        return cached_name(self.datadir, self.subpath)
+
+    @property
+    def filehash(self):
+        """Compute (and cache) the md5 hash of the file"""
+        if self._filehash is None:
+            self._filehash = hashlib.md5(
+                open(self.fullpath, 'rb').read()
+                ).hexdigest()
+        return self._filehash
+
+    def _cache_retrieved(self):
+        """If relevant, retrieve self from the cache."""
+        if self.use_cache and os.path.exists(self.cached_name):
+            try:
+                cached = pickle.load(open(self.cached_name, 'rb',))
+                if (
+                        cached['_filehash'] == self.filehash
+                        and cached['_version'] == self.CACHE_VERSION
+                ):
+                    for attribute in self.cached_attributes:
+                        setattr(self, attribute, cached[attribute])
+                    return True
+            except: # pylint: disable=bare-except
+                LOGGER.warning("Could not use cached version of {}.".format(
+                    self.fullpath
+                    ))
+        return False
+
     def _write_cache(self):
         """If relevant, write a dumbed down version of self to the cache."""
-        if self.datadir and self.config['_cache']:
-            cached = {}
-            for attribute in self.cached_attributes:
-                cached[attribute] = getattr(self, attribute)
+        if self.use_cache:
+            cached = {attr: getattr(self, attr) for attr in self.cached_attributes}
             pickle.dump(
                 cached,
-                open(cached_name(self.datadir, self.subpath), 'wb'),
+                open(self.cached_name, 'wb'),
                 protocol=-1
                 )
 
     def __repr__(self):
         return repr((self.titles, self.data, self.fullpath))
 
-    def render(self, output=None, *args, **kwargs):
+    def render(self, *args, **kwargs):
         """Return the code rendering this song.
 
         Arguments:
@@ -176,14 +191,14 @@ class Song:
         """
         raise NotImplementedError()
 
-    def _parse(self, config): # pylint: disable=no-self-use
+    def _parse(self): # pylint: disable=no-self-use
         """Parse song.
 
         It set the following attributes:
 
         - titles: the list of (raw) titles. This list will be processed to
           remove prefixes.
-        - lang: the main language of the song, as language code..
+        - lang: the main language of the song, as language code.
         - authors: the list of (raw) authors. This list will be processed to
           'clean' it (see function :func:`patacrep.authors.processauthors`).
         - data: song metadata. Used (among others) to sort the songs.
diff --git a/patacrep/songs/chordpro/__init__.py b/patacrep/songs/chordpro/__init__.py
index 0be23592..330b2f3e 100644
--- a/patacrep/songs/chordpro/__init__.py
+++ b/patacrep/songs/chordpro/__init__.py
@@ -25,26 +25,25 @@ class ChordproSong(Song):
 
     output_language = None
 
-    def _parse(self, config):
+    def _parse(self):
         """Parse content, and return the dictionary of song data."""
         with encoding.open_read(self.fullpath, encoding=self.encoding) as song:
             song = parse_song(song.read(), self.fullpath)
         self.authors = song.authors
         self.titles = song.titles
-        self.lang = song.get_data_argument('language', self.config['lang'])
+        self.lang = song.get_data_argument('language', self.default_lang)
         self.data = song.meta
         self.cached = {
             'song': song,
             }
 
-    def render(self, output=None, template="song"): # pylint: disable=arguments-differ
+    def render(self, template="song"): # pylint: disable=arguments-differ
         context = {
             'lang': self.lang,
             "titles": self.titles,
             "authors": self.authors,
             "metadata": self.data,
             "render": self._render_ast,
-            "config": self.config,
             "content": self.cached['song'].content,
             }
 
diff --git a/patacrep/songs/latex/__init__.py b/patacrep/songs/latex/__init__.py
index 8dd8d15b..d19cd10e 100644
--- a/patacrep/songs/latex/__init__.py
+++ b/patacrep/songs/latex/__init__.py
@@ -15,7 +15,7 @@ class Latex2LatexSong(Song):
     """Song written in LaTeX, rendered in LaTeX"""
     # pylint: disable=abstract-method
 
-    def _parse(self, __config):
+    def _parse(self):
         """Parse content, and return the dictionary of song data."""
         with encoding.open_read(self.fullpath, encoding=self.encoding) as song:
             self.data = parse_song(song.read(), self.fullpath)
@@ -29,16 +29,12 @@ class Latex2LatexSong(Song):
         else:
             self.authors = []
 
-    def render(self, output):
+    def render(self):
         """Return the code rendering the song."""
         # pylint: disable=signature-differs
-        if output is None:
-            raise ValueError(output)
-        path = files.path2posix(files.relpath(
-            self.fullpath,
-            os.path.dirname(output)
-        ))
-        return r'\import{{{}/}}{{{}}}'.format(os.path.dirname(path), os.path.basename(path))
+        filename = os.path.basename(self.fullpath)
+        path = os.path.abspath(os.path.dirname(self.fullpath))
+        return r'\import{{{}/}}{{{}}}'.format(files.path2posix(path), filename)
 
     def set_lang(self, language):
         """Set the language code"""
diff --git a/patacrep/templates.py b/patacrep/templates.py
index 6a799295..612a99e4 100644
--- a/patacrep/templates.py
+++ b/patacrep/templates.py
@@ -84,8 +84,8 @@ class Renderer:
         self.jinjaenv.filters['escape_tex'] = _escape_tex
         self.jinjaenv.trim_blocks = True
         self.jinjaenv.lstrip_blocks = True
-        self.jinjaenv.globals["path2posix"] = files.path2posix
-        self.jinjaenv.globals["lang2babel"] = lang2babel
+        self.jinjaenv.filters["path2posix"] = files.path2posix
+        self.jinjaenv.filters["lang2babel"] = lang2babel
         self.template = self.jinjaenv.get_template(template)
 
 
diff --git a/test/test_chordpro/test_parser.py b/test/test_chordpro/test_parser.py
index 39c37052..6834af4b 100644
--- a/test/test_chordpro/test_parser.py
+++ b/test/test_chordpro/test_parser.py
@@ -62,7 +62,7 @@ class FileTest(unittest.TestCase, metaclass=dynamic.DynamicTest):
                 with disable_logging():
                     song = self.song_plugins[LANGUAGES[destformat]]['sgc'](sourcename, self.config)
                     self.assertMultiLineEqual(
-                        song.render(output=sourcename).strip(),
+                        song.render().strip(),
                         expectfile.read().strip(),
                         )
 
diff --git a/test/test_compilation/datadir.tex.control b/test/test_compilation/datadir.tex.control
index a003cd42..14b11cb1 100644
--- a/test/test_compilation/datadir.tex.control
+++ b/test/test_compilation/datadir.tex.control
@@ -92,7 +92,7 @@ guitar,
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %% songs/./datadir.sg
 
-\import{datadir_datadir/songs/}{datadir.sg}
+\import{@TEST_FOLDER@/datadir_datadir/songs/}{datadir.sg}
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %% songs/./datadir.sgc
@@ -119,7 +119,7 @@ Chordpro}[
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %% songs/./datadir2.sg
 
-\import{datadir_datadir/songs/}{datadir2.sg}
+\import{@TEST_FOLDER@/datadir_datadir/songs/}{datadir2.sg}
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %% songs/./datadir2.sgc
@@ -146,7 +146,7 @@ Chordpro}[
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %% songs/./relative.sg
 
-\import{datadir_datadir/songs/}{relative.sg}
+\import{@TEST_FOLDER@/datadir_datadir/songs/}{relative.sg}
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %% songs/./relative.sgc
@@ -173,7 +173,7 @@ Chordpro}[
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %% songs/./subdir/subdir.sg
 
-\import{datadir_datadir/songs/subdir/}{subdir.sg}
+\import{@TEST_FOLDER@/datadir_datadir/songs/subdir/}{subdir.sg}
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %% songs/./subdir/subdir.sgc