diff --git a/Cargo.toml b/Cargo.toml
index 67ed8c44..0b8836ad 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -28,6 +28,10 @@ doc-comment = "0.3.3"
 once_cell = "1.9.0"
 
 config_rs = { package = "config", version = "0.11.0", features = ["toml"] }
+
+fluent-templates = "0.6.1"
+unic-langid = "0.9.0"
+
 actix-web = "4.0.0-rc.3"
 sycamore = { version = "0.8.0-beta.2", features = ["ssr"] }
 
diff --git a/config/settings.default.toml b/config/settings.default.toml
index cef2d7cf..dbbf8355 100644
--- a/config/settings.default.toml
+++ b/config/settings.default.toml
@@ -1,6 +1,8 @@
 [app]
 name = "PageTop Application"
 description = "Developed with the amazing PageTop framework."
+# Idioma (localización) predeterminado.
+language = "en-US"
 
 [webserver]
 # Configuración opcional del servidor web.
diff --git a/src/base/mod.rs b/src/base/mod.rs
new file mode 100644
index 00000000..fadf78f5
--- /dev/null
+++ b/src/base/mod.rs
@@ -0,0 +1,3 @@
+//! Temas, Módulos y Componentes base.
+
+pub mod module;
diff --git a/src/base/module/homepage/locales/en-US/homepage.ftl b/src/base/module/homepage/locales/en-US/homepage.ftl
new file mode 100644
index 00000000..380b29ee
--- /dev/null
+++ b/src/base/module/homepage/locales/en-US/homepage.ftl
@@ -0,0 +1,4 @@
+module_name = Default homepage
+module_desc = Displays a default homepage when none is configured.
+
+greeting = Hello { $name }!
diff --git a/src/base/module/homepage/locales/es-ES/homepage.ftl b/src/base/module/homepage/locales/es-ES/homepage.ftl
new file mode 100644
index 00000000..46571c42
--- /dev/null
+++ b/src/base/module/homepage/locales/es-ES/homepage.ftl
@@ -0,0 +1,4 @@
+module_name = Página de inicio predeterminada
+module_desc = Muestra una página de inicio predeterminada cuando no hay ninguna configurada.
+
+greeting = Hola { $name }!
diff --git a/src/base/module/homepage/mod.rs b/src/base/module/homepage/mod.rs
new file mode 100644
index 00000000..637659cd
--- /dev/null
+++ b/src/base/module/homepage/mod.rs
@@ -0,0 +1,39 @@
+use crate::prelude::*;
+
+localize!("en-US", "src/base/module/homepage/locales");
+
+pub struct HomepageModule;
+
+impl Module for HomepageModule {
+    fn name(&self) -> String {
+        l("module_name")
+    }
+
+    fn description(&self) -> String {
+        l("module_desc")
+    }
+
+    fn configure_module(&self, cfg: &mut server::web::ServiceConfig) {
+        cfg.service(
+            server::web::resource("/")
+                .route(server::web::get().to(greet))
+        );
+        cfg.service(
+            server::web::resource("/{name}")
+                .route(server::web::get().to(greet_with_param))
+        );
+    }
+}
+
+async fn greet() -> impl server::Responder {
+    t("greeting", &args!["name" => config_get!("app.name")])
+}
+
+async fn greet_with_param(req: server::HttpRequest) -> server::HttpResponse {
+    let name: String = req.match_info().get("name").unwrap_or("World").into();
+    let args = args!["name" => name];
+    server::HttpResponse::Ok()
+        .body(sycamore::render_to_string(|ctx| sycamore::view! { ctx,
+            p { (t("greeting", &args)) }
+        }))
+}
diff --git a/src/base/module/mod.rs b/src/base/module/mod.rs
new file mode 100644
index 00000000..070e5b82
--- /dev/null
+++ b/src/base/module/mod.rs
@@ -0,0 +1 @@
+pub mod homepage;
diff --git a/src/config/settings.rs b/src/config/settings.rs
index ffb316f6..88c5805d 100644
--- a/src/config/settings.rs
+++ b/src/config/settings.rs
@@ -72,6 +72,7 @@ macro_rules! config_map {
 pub struct App {
     pub name         : String,
     pub description  : String,
+    pub language     : String,
     pub run_mode     : String,
 }
 
@@ -88,7 +89,7 @@ pub struct Settings {
 }
 
 config_map!(r#"
-Ajustes globales y valores por defecto para las secciones *\[app\]* y
+Ajustes globales y valores predeterminados para las secciones *\[app\]* y
 *\[webserver\]* específicas de PageTop.
 "#,
     SETTINGS, Settings,
@@ -96,6 +97,7 @@ Ajustes globales y valores por defecto para las secciones *\[app\]* y
     // [app]
     "app.name"               => "PageTop Application",
     "app.description"        => "Developed with the amazing PageTop framework.",
+    "app.language"           => "en-US",
 
     // [webserver]
     "webserver.bind_address" => "localhost",
diff --git a/src/core/server/main.rs b/src/core/server/main.rs
index 3f5a7d90..49e78a65 100644
--- a/src/core/server/main.rs
+++ b/src/core/server/main.rs
@@ -1,12 +1,17 @@
+use crate::base;
 use crate::config::SETTINGS;
-use crate::core::{Server, all, server};
+use crate::core::{Server, all, register_module, server};
 
 pub fn run(bootstrap: Option<fn()>) -> Result<Server, std::io::Error> {
-    // Ejecuta la función de inicio específica para la aplicación.
+    // Ejecuta la función de arranque de la aplicación.
     if bootstrap != None {
         let _ = &(bootstrap.unwrap())();
     }
 
+    // Registra la página de inicio de PageTop como último módulo.
+    // Así, la función de arranque de la aplicación podría sobrecargarlo.
+    register_module(&base::module::homepage::HomepageModule);
+
     // Inicializa el servidor web.
     let server = server::HttpServer::new(|| {
         server::App::new()
diff --git a/src/lib.rs b/src/lib.rs
index 15be4ce1..87e80aac 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -7,5 +7,10 @@ pub use once_cell::sync::Lazy;
 // APIs públicas.
 // -----------------------------------------------------------------------------
 
+pub mod macros;     // Macros útiles.
 pub mod config;     // Gestión de la configuración.
+pub mod locale;     // Localización.
 pub mod core;       // Servidor web y sistemas para Temas, Módulos y Respuestas.
+pub mod base;       // Temas, Módulos y Componentes base.
+
+pub mod prelude;    // Re-exporta recursos comunes.
diff --git a/src/locale/mod.rs b/src/locale/mod.rs
new file mode 100644
index 00000000..21fd7bd1
--- /dev/null
+++ b/src/locale/mod.rs
@@ -0,0 +1,47 @@
+use crate::Lazy;
+use crate::config::SETTINGS;
+
+use unic_langid::LanguageIdentifier;
+
+pub use fluent_templates::{static_loader as static_locale, Loader as Locale};
+pub use fluent_templates;
+pub use fluent_templates::fluent_bundle::FluentValue;
+
+/// Almacena el Identificador de Idioma Unicode ([Unicode Language Identifier]
+/// (https://unicode.org/reports/tr35/tr35.html#Unicode_language_identifier)) de
+/// la aplicación, obtenido de `SETTINGS.app.language`.
+pub static LANGID: Lazy<LanguageIdentifier> = Lazy::new(|| {
+    SETTINGS.app.language.parse().expect("Failed to parse.")
+});
+
+#[macro_export]
+/// Permite integrar fácilmente localización en tus temas y módulos.
+macro_rules! localize {
+    ( $DEF_LANGID:literal, $locales:literal $(, $core_locales:literal)? ) => {
+        use $crate::locale::*;
+
+        static_locale! {
+            static LOCALES = {
+                locales: $locales,
+                $( core_locales: $core_locales, )?
+                fallback_language: $DEF_LANGID,
+
+                // Elimina las marcas Unicode que delimitan los argumentos.
+                customise: |bundle| bundle.set_use_isolating(false),
+            };
+        }
+
+        #[allow(dead_code)]
+        pub fn l(key: &str) -> String {
+            LOCALES.lookup(&LANGID, key)
+        }
+
+        #[allow(dead_code)]
+        pub fn t(
+            key: &str,
+            args: &std::collections::HashMap<String, FluentValue>
+        ) -> String {
+            LOCALES.lookup_with_args(&LANGID, key, args)
+        }
+    };
+}
diff --git a/src/macros/mod.rs b/src/macros/mod.rs
new file mode 100644
index 00000000..ef3c05d5
--- /dev/null
+++ b/src/macros/mod.rs
@@ -0,0 +1,19 @@
+#[macro_export]
+/// Macro para construir grupos de pares clave-valor.
+///
+/// ```
+/// let args = args![
+///     "userName" => "Roberto",
+///     "photoCount" => 3,
+///     "userGender" => "male"
+/// ];
+/// ```
+macro_rules! args {
+    ( $($key:expr => $value:expr),* ) => {{
+        let mut a = std::collections::HashMap::new();
+        $(
+            a.insert(String::from($key), $value.into());
+        )*
+        a
+    }};
+}
\ No newline at end of file
diff --git a/src/main.rs b/src/main.rs
index 4d3e46b9..96cee3df 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,53 +1,4 @@
-use pagetop::config_get;
-use pagetop::core::module::Module;
-use pagetop::core::{register_module, server};
-
-struct Greet;
-impl Module for Greet {
-    fn name(&self) -> String {
-        "Hello".to_string()
-    }
-
-    fn configure_module(&self, cfg: &mut server::web::ServiceConfig) {
-        cfg.service(
-            server::web::resource("/")
-                .route(server::web::get().to(greet))
-        );
-    }
-}
-
-async fn greet() -> impl server::Responder {
-    format!("Hello from {}!", config_get!("app.name"))
-}
-
-struct GreetWithParam;
-impl Module for GreetWithParam {
-    fn name(&self) -> String {
-        "Hello World!".to_string()
-    }
-
-    fn configure_module(&self, cfg: &mut server::web::ServiceConfig) {
-        cfg.service(
-            server::web::resource("/{name}")
-                .route(server::web::get().to(greet_with_param))
-        );
-    }
-}
-
-async fn greet_with_param(req: server::HttpRequest) -> server::HttpResponse {
-    let name: String = req.match_info().get("name").unwrap_or("World").into();
-    server::HttpResponse::Ok()
-        .body(sycamore::render_to_string(|ctx| sycamore::view! { ctx,
-            p { "Hello " (name) "!" }
-        }))
-}
-
-fn bootstrap() {
-    register_module(&Greet);
-    register_module(&GreetWithParam);
-}
-
 #[tokio::main]
 async fn main() -> std::io::Result<()> {
-    server::run(Some(bootstrap))?.await
+    pagetop::core::server::run(None)?.await
 }
diff --git a/src/prelude.rs b/src/prelude.rs
new file mode 100644
index 00000000..43370939
--- /dev/null
+++ b/src/prelude.rs
@@ -0,0 +1,10 @@
+//! Re-exporta recursos comunes.
+
+pub use crate::args;
+pub use crate::config_get;
+pub use crate::localize;
+
+pub use crate::core::module::*;
+
+pub use crate::core::server;
+pub use crate::core::register_module;