diff --git a/src/routes/agreements.rs b/src/routes/agreements.rs
index 3f584a2..867dc87 100644
--- a/src/routes/agreements.rs
+++ b/src/routes/agreements.rs
@@ -29,6 +29,7 @@ fn build_securitytxt(config: Config) -> String {
             pref_lang: config.fc.lang.unwrap_or_default(),
         },
         InfosPage::default(),
+        None,
     )
 }
 
@@ -56,6 +57,7 @@ fn build_humanstxt(config: Config) -> String {
             name: config.fc.fullname.unwrap_or_default(),
         },
         InfosPage::default(),
+        None,
     )
 }
 
@@ -95,5 +97,6 @@ fn build_webmanifest(config: Config) -> String {
             url: get_url(config.fc),
         },
         InfosPage::default(),
+        None,
     )
 }
diff --git a/src/routes/blog.rs b/src/routes/blog.rs
index 6676794..0d58799 100644
--- a/src/routes/blog.rs
+++ b/src/routes/blog.rs
@@ -37,13 +37,13 @@ fn build_index(config: Config, lang: Lang) -> String {
     let mut posts = get_posts(&format!("{blog_dir}/{POST_DIR}"));
 
     // Get about
-    let about = read_file_fallback(
+    let (about, html_lang) = read_file_fallback(
         FilePath {
             base: blog_dir,
             path: "about.md".to_owned(),
         },
         MType::Generic,
-        lang,
+        &lang,
     );
 
     // Sort from newest to oldest
@@ -69,6 +69,7 @@ fn build_index(config: Config, lang: Lang) -> String {
             )),
             kw: Some(make_kw(&["blog", "blogging"])),
         },
+        Some(html_lang),
     )
 }
 
@@ -107,6 +108,7 @@ fn build_post(file: &str, config: Config) -> String {
             toc,
         },
         infos,
+        None,
     )
 }
 
diff --git a/src/routes/contact.rs b/src/routes/contact.rs
index 494bf0b..0fca8b1 100644
--- a/src/routes/contact.rs
+++ b/src/routes/contact.rs
@@ -84,13 +84,13 @@ fn build_page(config: Config, lang: Lang) -> String {
     let ext = ".md";
 
     // Get about
-    let about = read_file_fallback(
+    let (about, html_lang) = read_file_fallback(
         FilePath {
             base: contacts_dir.clone(),
             path: "about.md".to_owned(),
         },
         MType::Generic,
-        lang,
+        &lang,
     );
 
     let mut socials = read(&FilePath {
@@ -139,5 +139,6 @@ fn build_page(config: Config, lang: Lang) -> String {
                 "linktree",
             ])),
         },
+        Some(html_lang),
     )
 }
diff --git a/src/routes/contrib.rs b/src/routes/contrib.rs
index ddda4ba..d7b03ff 100644
--- a/src/routes/contrib.rs
+++ b/src/routes/contrib.rs
@@ -87,5 +87,6 @@ async fn build_page(config: Config) -> String {
                 "code",
             ])),
         },
+        None,
     )
 }
diff --git a/src/routes/cours.rs b/src/routes/cours.rs
index ad3a711..6c64bdc 100644
--- a/src/routes/cours.rs
+++ b/src/routes/cours.rs
@@ -107,5 +107,6 @@ fn build_page(info: &web::Query<PathRequest>, config: Config) -> String {
                 "digital garden",
             ])),
         },
+        None,
     )
 }
diff --git a/src/routes/index.rs b/src/routes/index.rs
index da16348..cf574e8 100644
--- a/src/routes/index.rs
+++ b/src/routes/index.rs
@@ -36,13 +36,13 @@ struct StyleAvatar {
 
 #[cached(time = 60)]
 fn build_page(config: Config, lang: Lang) -> String {
-    let mut file = read_file_fallback(
+    let (mut file, html_lang) = read_file_fallback(
         FilePath {
             base: config.locations.data_dir.clone(),
             path: "index.md".to_owned(),
         },
         MType::Index,
-        lang,
+        &lang,
     );
 
     // Default values
@@ -101,5 +101,6 @@ fn build_page(config: Config, lang: Lang) -> String {
             desc: Some("Page principale".into()),
             kw: Some(make_kw(&["index", "étudiant", "accueil"])),
         },
+        Some(html_lang),
     )
 }
diff --git a/src/routes/not_found.rs b/src/routes/not_found.rs
index 276bf78..8d97a66 100644
--- a/src/routes/not_found.rs
+++ b/src/routes/not_found.rs
@@ -32,5 +32,6 @@ fn build_page(config: Config) -> String {
             desc: Some("Une page perdu du web".into()),
             ..InfosPage::default()
         },
+        None,
     )
 }
diff --git a/src/routes/portfolio.rs b/src/routes/portfolio.rs
index 9950eb5..b6dc58a 100644
--- a/src/routes/portfolio.rs
+++ b/src/routes/portfolio.rs
@@ -39,13 +39,13 @@ fn build_page(config: Config, lang: Lang) -> String {
     let ext = ".md";
 
     // Get about
-    let about = read_file_fallback(
+    let (about, html_lang) = read_file_fallback(
         FilePath {
             base: projects_dir,
             path: "about.md".to_owned(),
         },
         MType::Generic,
-        lang,
+        &lang,
     );
 
     // Get apps
@@ -115,5 +115,6 @@ fn build_page(config: Config, lang: Lang) -> String {
                 "code",
             ])),
         },
+        Some(html_lang),
     )
 }
diff --git a/src/routes/web3.rs b/src/routes/web3.rs
index 1c00d6e..7f74544 100644
--- a/src/routes/web3.rs
+++ b/src/routes/web3.rs
@@ -22,5 +22,6 @@ fn build_page(config: Config) -> String {
             desc: Some("Coin reculé de l'internet".into()),
             kw: Some(make_kw(&["web3", "blockchain", "nft", "ai"])),
         },
+        None,
     )
 }
diff --git a/src/template.rs b/src/template.rs
index 205752d..5c813d1 100644
--- a/src/template.rs
+++ b/src/template.rs
@@ -1,5 +1,7 @@
 use ramhorns::{Content, Ramhorns};
 
+use crate::utils::misc::Lang;
+
 /// Structure used in the config variable of the app
 #[derive(Clone, Debug, Hash, PartialEq, Eq)]
 pub struct Template {
@@ -51,12 +53,20 @@ struct DataPage<T> {
     page_kw: Option<String>,
     /// Author's name
     page_author: Option<String>,
+    /// Language used
+    lang: String,
     /// Data needed to render the page
     data: T,
 }
 
 impl Template {
-    pub fn render<C: Content>(&self, template: &str, data: C, info: InfosPage) -> String {
+    pub fn render<C: Content>(
+        &self,
+        template: &str,
+        data: C,
+        info: InfosPage,
+        lang: Option<String>,
+    ) -> String {
         let mut templates: Ramhorns = Ramhorns::lazy(&self.directory).unwrap();
         let tplt = templates.from_file(template).unwrap();
 
@@ -67,6 +77,7 @@ impl Template {
             page_desc: info.desc,
             page_kw: info.kw,
             page_author: self.name.clone(),
+            lang: lang.unwrap_or(Lang::default()),
             data,
         })
     }
diff --git a/src/utils/misc.rs b/src/utils/misc.rs
index e267d7b..ebce6e8 100644
--- a/src/utils/misc.rs
+++ b/src/utils/misc.rs
@@ -59,12 +59,18 @@ impl Responder for Html {
 }
 
 /// Read a file localized, fallback to default file if localized file isn't found
-pub fn read_file_fallback(filename: FilePath, expected_file: MType, lang: Lang) -> Option<File> {
-    read_file(filename.clone(), expected_file, Some(lang)).or(read_file(
-        filename,
-        expected_file,
-        None,
-    ))
+pub fn read_file_fallback(
+    filename: FilePath,
+    expected_file: MType,
+    lang: &Lang,
+) -> (Option<File>, String) {
+    match read_file(filename.clone(), expected_file, Some(lang.clone())) {
+        None => (
+            read_file(filename, expected_file, None),
+            Lang::English.to_string(),
+        ),
+        data => (data, lang.to_string()),
+    }
 }
 
 /// Read a file
@@ -143,6 +149,21 @@ pub enum Lang {
     English,
 }
 
+impl Lang {
+    pub fn default() -> String {
+        Lang::French.to_string()
+    }
+}
+
+impl std::fmt::Display for Lang {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        match self {
+            Lang::French => write!(f, "fr"),
+            Lang::English => write!(f, "en"),
+        }
+    }
+}
+
 /// Get the browser language
 pub fn lang(headers: &HeaderMap) -> Lang {
     headers
diff --git a/templates/404.html b/templates/404.html
index ba07cf2..a22b350 100644
--- a/templates/404.html
+++ b/templates/404.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html lang="fr">
+<html lang="{{lang}}">
   <head dir="ltr">
     {{>head.html}}
   </head>
diff --git a/templates/blog/index.html b/templates/blog/index.html
index 50291fb..313932b 100644
--- a/templates/blog/index.html
+++ b/templates/blog/index.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html lang="fr">
+<html lang="{{lang}}">
   <head dir="ltr">
     {{>head.html}}
     <link
diff --git a/templates/blog/post.html b/templates/blog/post.html
index f3e5e96..433d6e9 100644
--- a/templates/blog/post.html
+++ b/templates/blog/post.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html lang="fr">
+<html lang="{{lang}}">
   <head dir="ltr">
     {{>head.html}}
     <link
diff --git a/templates/contact/index.html b/templates/contact/index.html
index 83e1b1d..287e880 100644
--- a/templates/contact/index.html
+++ b/templates/contact/index.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html lang="fr">
+<html lang="{{lang}}">
   <head dir="ltr">
     {{>head.html}}
     <link rel="stylesheet" href="/css/contact.css" />
diff --git a/templates/contrib.html b/templates/contrib.html
index a3f3f8c..0422a61 100644
--- a/templates/contrib.html
+++ b/templates/contrib.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html lang="fr">
+<html lang="{{lang}}">
   <head dir="ltr">
     {{>head.html}}
     <link rel="stylesheet" href="/css/contrib.css" />
diff --git a/templates/cours.html b/templates/cours.html
index 3b128c5..7616fd7 100644
--- a/templates/cours.html
+++ b/templates/cours.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html lang="fr">
+<html lang="{{lang}}">
   <head dir="ltr">
     {{>head.html}}
     <link rel="stylesheet" href="/css/cours.css" />
diff --git a/templates/index.html b/templates/index.html
index 63b99f2..ecdc2b3 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html lang="fr">
+<html lang="{{lang}}">
   <head dir="ltr">
     {{>head.html}}
     <link rel="stylesheet" href="/css/index.css" />
diff --git a/templates/portfolio/index.html b/templates/portfolio/index.html
index 8e095b6..1d02730 100644
--- a/templates/portfolio/index.html
+++ b/templates/portfolio/index.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html lang="fr">
+<html lang="{{lang}}">
   <head dir="ltr">
     {{>head.html}}
     <link rel="stylesheet" href="/css/portfolio.css" />
diff --git a/templates/web3.html b/templates/web3.html
index c753149..86b44d9 100644
--- a/templates/web3.html
+++ b/templates/web3.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html class="index" lang="fr">
+<html class="index" lang="{{lang}}">
   <head dir="ltr">
     <title>{{page_title}}{{#page_title}} - {{/page_title}}{{app_name}}</title>
     <meta charset="UTF-8" />