diff --git a/content/pages/a_page.md b/content/pages/a_page.md
index 19c7922..f37368f 100644
--- a/content/pages/a_page.md
+++ b/content/pages/a_page.md
@@ -11,5 +11,4 @@ template_engine jinja2
 
 <h2>Page 1</h2>
 
-<p>Go to <a href="{{ url('page', args=['page2']) }}">page 2</a> </p>
-
+<p>Go to <a href="{{ url_for_slug('page2') }}">page 2</a> </p>
\ No newline at end of file
diff --git a/content/pages/another_page.md b/content/pages/another_page.md
index 9e1c210..17f11b8 100644
--- a/content/pages/another_page.md
+++ b/content/pages/another_page.md
@@ -11,4 +11,4 @@ template_engine jinja2
 
 <h2> Page 2 </h2>
 
-<p>Go to <a href="{{ url('page', args=['page1']) }}">page 1</a> </p>
+<p>Go to <a href="{{ url_for_slug('page1') }}">page 1</a> </p>
diff --git a/content/templates/jinja2/blocks/en/navbar.html b/content/templates/jinja2/blocks/en/navbar.html
index d2ddb7b..1793de7 100644
--- a/content/templates/jinja2/blocks/en/navbar.html
+++ b/content/templates/jinja2/blocks/en/navbar.html
@@ -4,7 +4,7 @@
     CTA_LABEL="See pricing",
     CTA_TARGET="",
     CTA_URL="#pricing",
-    CHANGE_LANG_URL="fr-index",
+    CHANGE_LANG_URL="/fr-index",
     CHANGE_LANG_FLAG_URL="assets/img/lang-fr.svg",
     CHANGE_LANG_ALT="Version française" 
   ) }}
\ No newline at end of file
diff --git a/content/templates/jinja2/blocks/fr/navbar.html b/content/templates/jinja2/blocks/fr/navbar.html
index 29345f5..1baace1 100644
--- a/content/templates/jinja2/blocks/fr/navbar.html
+++ b/content/templates/jinja2/blocks/fr/navbar.html
@@ -4,7 +4,7 @@
     CTA_LABEL="Découvrir les tarifs",
     CTA_TARGET="",
     CTA_URL="#pricing",
-    CHANGE_LANG_URL="en-index",
+    CHANGE_LANG_URL="/en-index",
     CHANGE_LANG_FLAG_URL="assets/img/lang-gb.svg",
     CHANGE_LANG_ALT="English version" 
   ) }}
\ No newline at end of file
diff --git a/content/templates/jinja2/widgets/navbar.html b/content/templates/jinja2/widgets/navbar.html
index ed7983c..dada97a 100644
--- a/content/templates/jinja2/widgets/navbar.html
+++ b/content/templates/jinja2/widgets/navbar.html
@@ -19,7 +19,7 @@
     <div class="navbar__container__right">
       <a class="btn btn-sm btn-primary" href="{{ CTA_URL }}"
          target="{{ CTA_TARGET }}">{{ CTA_LABEL }}</a>
-      <a href="{{ url('page', args=[CHANGE_LANG_URL]) }}">
+      <a href="{{ url_for_slug_path(CHANGE_LANG_URL) }}">
         <img class="languageFlag" src="{{ static(CHANGE_LANG_FLAG_URL)}}" alt="{{ CHANGE_LANG_ALT }}"/>
       </a>
     </div>
diff --git a/jssg/jinja2.py b/jssg/jinja2.py
index 5bea8bb..dcbbf73 100644
--- a/jssg/jinja2.py
+++ b/jssg/jinja2.py
@@ -5,8 +5,85 @@
 
 from jssg.templatetags.filter_opengraph_metadata import filter_opengraph_metadata
 
-from jssg.models import Document
-from django.conf import settings
+from jssg.models import Page
+
+import re
+
+def url_for_slug(slug) :
+    """
+    @param slug: the slug of the page to search
+    @return: the string of the url corresponding to the page
+    @error: raise an exception if the slug does not exist or it is not unique (eg same slug found in several folders)
+
+    >>> url_for_slug('index') # the slug exists and is unique
+    /en/index.html
+
+    >>> url_for_slug('index-duplicated') # the slug exists in several pages
+    Traceback (most recent call last):
+      ...
+    Exception: slug 'index-duplicated' is not unique, found in : [pages/fr-index.md, pages/en-index.md] ; use url_for_slug_path()
+
+    >>> url_for_slug('index-removed') # the slug does not exists
+    Traceback (most recent call last):
+      ...
+    Exception: slug 'index-removed' not found
+
+    """
+
+    url = ""
+    pages_with_slug = []
+
+    for page in Page.load_glob(all=True) :
+        if page.slug == slug : # the page exists
+            if pages_with_slug == [] : # the slug has not been found yet
+                if page.rel_folder_path != '' :
+                    url = "/" + page.rel_folder_path + "/" + page.slug + ".html"
+                else :
+                    url = "/" + page.slug + ".html"
+            else : # the slug already exists
+                url = ""
+            pages_with_slug.append(str(page.path.relative_to(page.content_page_dir.parent)))
+
+    if url == "" and pages_with_slug != [] :
+        raise Exception("slug '%s' is not unique, found in : [%s] ; use url_for_slug_path()" % (slug, ", ".join(pages_with_slug)))
+    elif url == "" :
+        raise Exception("slug '%s' not found" % slug)
+    return url
+
+def url_for_slug_path(url_path) :
+    """
+    @param url_path: the url of the page to search (absolute path)
+    @return: the string of the slug url corresponding to the page
+    @error: raise an exception if the url is a dead link
+
+    >>> url_for_slug_path('/en/index') # the page exists
+    /en/index.html
+
+    >>> url_for_slug_path('/en/index-removed') # the page does not exist
+    Traceback (most recent call last):
+    ...
+    Exception: page for '/en/index-removed' url not found (dead link)
+
+    >>> url_for_slug_path('folder/index')
+    Traceback (most recent call last):
+      ...
+    Exception: url 'folder/index' is not valid ; correct urls are /<dir>/<slug> or /<slug>
+
+    """
+    # Valid url are /<dir>/<slug>.html or /<slug>.html
+    # Example: if url_path is "/tmp/folder/subfolder/thefile.html", then slug will be "thefile" and the dir will be "tmp/folder/subfolder"
+    # Note : the dir does not start with '/' since the url parsed in url.py do not either
+    try :
+        _, dir, slug = re.findall(r"(^|^/([a-zA-Z0-9/-]+))/([a-zA-Z0-9-]+)$", url_path)[0]
+    except :
+        raise Exception("url '%s' is not valid ; correct urls are /<dir>/<slug> or /<slug>" % url_path)
+
+    # Verify that the page exists
+    for page in Page.load_glob(all=True) :
+        if page.slug == slug and page.rel_folder_path == dir :
+            return url_path + ".html"
+
+    raise Exception("page for '%s' url not found (dead link)" % url_path)
 
 def environment(**options):
     env = Environment(**options)
@@ -14,6 +91,8 @@ def environment(**options):
         {
             "static": static,
             "url": reverse,
+            "url_for_slug": url_for_slug,
+            "url_for_slug_path" : url_for_slug_path
         }
     )
     env.filters.update(
diff --git a/jssg/models.py b/jssg/models.py
index a44cc22..e8e5b15 100644
--- a/jssg/models.py
+++ b/jssg/models.py
@@ -196,7 +196,7 @@ def load(cls, path: Path) -> "Document":
 
     @classmethod
     def load_glob(
-        cls, path: Optional[List[Path]] = None, glob: str = "*.md"
+        cls, path: Optional[List[Path]] = None, dir = "", glob: str = "*.md", all=False
     ) -> Iterator["Document"]:
         """Load multiple document.
 
@@ -212,7 +212,10 @@ def load_glob(
         
         files = []
         for p in path :
-            files += p.glob(glob)
+            if all :
+                files += (p / dir).rglob(glob)
+            else :
+                files += (p / dir).glob(glob)
         # print(files)
         return map(cls.load, files)
 
@@ -235,20 +238,29 @@ def __init__(self, content: str, **metadata) -> None:
         except KeyError:
             self.slug = slugify(self.title)
 
+        self.content_page_dir = self.path
+        while (self.content_page_dir not in self.BASE_DIR) :
+            self.content_page_dir = self.content_page_dir.parent
+
+        # page folder path relative to its content_page_dir
+        self.rel_folder_path = str(self.path.relative_to(self.content_page_dir).parent)
+        if self.rel_folder_path == '.' :
+            self.rel_folder_path = ''
+
     @classmethod
-    def load_page_with_slug(cls, slug: str) -> "Page":
-        return next(filter(lambda p: p.slug == slug, cls.load_glob()))
+    def load_page_with_slug(cls, slug: str, dir : str) -> "Page":
+        return next(filter(lambda p: p.slug == slug, cls.load_glob(dir = dir)))
 
     @classmethod
     def load_glob(
-        cls, path: Optional[List[Path]] = None, glob: str = "*.md"
+        cls, path: Optional[List[Path]] = None, dir = "", glob: str = "*.md", all = False
     ) -> Iterator["Page"]:
         """Overridden only to make the static typing happy."""
-        return super().load_glob(path, glob)
+        return super().load_glob(path, dir, glob, all)
     
     @classmethod
-    def get_pages(cls):
-        return ({"slug": p.slug} for p in Page.load_glob())
+    def get_pages(cls) :
+        return ({"slug": p.slug} if p.rel_folder_path == '' else {"dir": p.rel_folder_path, "slug" : p.slug} for p in Page.load_glob(all = True))
 
 
 class Post(Page):
@@ -267,14 +279,14 @@ def __init__(self, content: str, **metadata) -> None:
 
     @classmethod
     def load_glob(
-        cls, path: Optional[List[Path]] = None, glob: str = "*.md"
+        cls, path: Optional[List[Path]] = None, dir = "", glob: str = "*.md", all = False
     ) -> Iterator["Post"]:
         """Overridden only to make the static typing happy."""
-        return super().load_glob(path, glob)
-
+        return super().load_glob(path, dir, glob, all)
+    
     @classmethod
-    def get_posts(cls):
-        return ({"slug": p.slug} for p in Post.load_glob())
+    def get_posts(cls) :
+        return ({"slug": p.slug} if p.rel_folder_path == '' else {"dir": p.rel_folder_path, "slug" : p.slug} for p in Post.load_glob(all = True))
 
 class Sitemap :
     BASE_DIR = settings.JFME_PAGES_DIRS + settings.JFME_POSTS_DIRS
diff --git a/jssg/urls.py b/jssg/urls.py
index d53b63d..513dc1a 100644
--- a/jssg/urls.py
+++ b/jssg/urls.py
@@ -16,14 +16,24 @@
 
 from jssg import views
 from jssg.models import Page, Post
+from jssg import settings 
 
 
+# print([p for p in Page.get_pages()])
+
 urlpatterns = [
     distill_path(
         "", views.IndexView.as_view(), name="index", distill_file="index.html"
     ),
-    distill_path(
-        "pages/<slug:slug>.html",
+    distill_path("atom.xml", views.PostFeedsView(), name="atom_feed"),
+    distill_re_path(
+        r'^(?!posts/)(?P<slug>[a-zA-Z0-9-]+).html$',
+        views.PageView.as_view(),
+        name="page",
+        distill_func=Page.get_pages,
+    ),
+    distill_re_path(
+        r'^(?!posts/)(?P<dir>[a-zA-Z-/]+)/(?P<slug>[a-zA-Z0-9-]+).html$',
         views.PageView.as_view(),
         name="page",
         distill_func=Page.get_pages,
@@ -35,6 +45,12 @@
         name="post",
         distill_func=Post.get_posts,
     ),
+    distill_path(
+        "posts/<path:dir>/<slug:slug>.html",
+        views.PostView.as_view(),
+        name="post",
+        distill_func=Post.get_posts,
+    ),
     distill_path(
         "sitemap.xml",
         views.SitemapView.as_view(),
diff --git a/jssg/views.py b/jssg/views.py
index ead7530..2aa9004 100644
--- a/jssg/views.py
+++ b/jssg/views.py
@@ -51,8 +51,11 @@ class PageView(DetailView):
     template_name = "page.html"
 
     def get_object(self, queryset=None) -> Model:
-        print(self.kwargs["slug"])
-        model = self.model.load_page_with_slug(self.kwargs["slug"])
+        if "dir" not in self.kwargs.keys() :
+            self.kwargs["dir"] = ""
+        print("dir : " + self.kwargs["dir"])
+        print("slug : " + self.kwargs["slug"])
+        model = self.model.load_page_with_slug(self.kwargs["slug"], self.kwargs["dir"])
         return model