diff --git a/extensions/pagetop-aliner/src/lib.rs b/extensions/pagetop-aliner/src/lib.rs
index 95f22196..7a29eebc 100644
--- a/extensions/pagetop-aliner/src/lib.rs
+++ b/extensions/pagetop-aliner/src/lib.rs
@@ -83,6 +83,8 @@ async fn homepage(request: HttpRequest) -> ResultPage<Markup, ErrorPage> {
 
 use pagetop::prelude::*;
 
+include_locales!(LOCALES_ALINER);
+
 /// Implementa el tema para usar en pruebas que muestran el esquema de páginas HTML.
 ///
 /// Define un tema mínimo útil para:
@@ -94,6 +96,14 @@ use pagetop::prelude::*;
 pub struct Aliner;
 
 impl Extension for Aliner {
+    fn name(&self) -> L10n {
+        L10n::t("extension_name", &LOCALES_ALINER)
+    }
+
+    fn description(&self) -> L10n {
+        L10n::t("extension_description", &LOCALES_ALINER)
+    }
+
     fn theme(&self) -> Option<ThemeRef> {
         Some(&Self)
     }
diff --git a/extensions/pagetop-aliner/src/locale/en-US/extension.ftl b/extensions/pagetop-aliner/src/locale/en-US/extension.ftl
new file mode 100644
index 00000000..e4fca26d
--- /dev/null
+++ b/extensions/pagetop-aliner/src/locale/en-US/extension.ftl
@@ -0,0 +1,2 @@
+extension_name = Aliner
+extension_description = Minimal theme that schematically shows the HTML page composition.
diff --git a/extensions/pagetop-aliner/src/locale/es-ES/extension.ftl b/extensions/pagetop-aliner/src/locale/es-ES/extension.ftl
new file mode 100644
index 00000000..5501e15a
--- /dev/null
+++ b/extensions/pagetop-aliner/src/locale/es-ES/extension.ftl
@@ -0,0 +1,2 @@
+extension_name = Aliner
+extension_description = Tema mínimo que muestra esquemáticamente la composición de las páginas HTML.
\ No newline at end of file