diff --git a/admin/comandos.php b/admin/comandos.php
index 68074ee..ee38832 100755
--- a/admin/comandos.php
+++ b/admin/comandos.php
@@ -1,10 +1,11 @@
 <?php
 require_once __DIR__ . '/../includes/db.php';
 require_once __DIR__ . '/../includes/session_check.php';
+require_once __DIR__ . '/../includes/i18n.php';
 
 requireAdmin();
 
-$pageTitle = 'Gestión de Comandos';
+$pageTitle = t('Gestión de Comandos');
 
 $templates = [];
 try {
diff --git a/admin/ia_agent.php b/admin/ia_agent.php
index cd0aefc..bb12e55 100755
--- a/admin/ia_agent.php
+++ b/admin/ia_agent.php
@@ -1,10 +1,11 @@
 <?php
 require_once __DIR__ . '/../includes/db.php';
 require_once __DIR__ . '/../includes/session_check.php';
+require_once __DIR__ . '/../includes/i18n.php';
 
 requireAdmin();
 
-$pageTitle = 'Configuración del Agente IA';
+$pageTitle = t('Configuración del Agente IA');
 
 require_once __DIR__ . '/../templates/header.php';
 
diff --git a/admin/languages.php b/admin/languages.php
index 884bc8f..759d941 100755
--- a/admin/languages.php
+++ b/admin/languages.php
@@ -1,13 +1,14 @@
 <?php
 require_once __DIR__ . '/../includes/db.php';
 require_once __DIR__ . '/../includes/session_check.php';
+require_once __DIR__ . '/../includes/i18n.php';
 require_once __DIR__ . '/../includes/activity_logger.php';
 require_once __DIR__ . '/../includes/env_loader.php';
 require_once __DIR__ . '/../src/Translate.php';
 
 requireAdmin();
 
-$pageTitle = 'Gestión de Idiomas';
+$pageTitle = t('Gestión de Idiomas');
 
 $languages = [];
 try {
diff --git a/admin/recipients.php b/admin/recipients.php
index f2e4b6c..9fbcffb 100755
--- a/admin/recipients.php
+++ b/admin/recipients.php
@@ -1,11 +1,12 @@
 <?php
 require_once __DIR__ . '/../includes/db.php';
 require_once __DIR__ . '/../includes/session_check.php';
+require_once __DIR__ . '/../includes/i18n.php';
 require_once __DIR__ . '/../includes/activity_logger.php';
 
 requireAdmin();
 
-$pageTitle = 'Gestión de Destinatarios';
+$pageTitle = t('Gestión de Destinatarios');
 
 $recipients = [];
 $languages = [];
diff --git a/admin/test_discord_connection.php b/admin/test_discord_connection.php
index 7db2476..657a0a7 100755
--- a/admin/test_discord_connection.php
+++ b/admin/test_discord_connection.php
@@ -2,10 +2,11 @@
 require_once __DIR__ . '/../includes/db.php';
 require_once __DIR__ . '/../includes/session_check.php';
 require_once __DIR__ . '/../includes/env_loader.php';
+require_once __DIR__ . '/../includes/i18n.php';
 
 requireAdmin();
 
-$pageTitle = 'Test de Conexión Discord';
+$pageTitle = t('Test de Conexión Discord');
 
 $results = [];
 $error = '';
diff --git a/admin/users.php b/admin/users.php
index da14d68..a1b670c 100755
--- a/admin/users.php
+++ b/admin/users.php
@@ -1,11 +1,12 @@
 <?php
 require_once __DIR__ . '/../includes/db.php';
 require_once __DIR__ . '/../includes/session_check.php';
+require_once __DIR__ . '/../includes/i18n.php';
 require_once __DIR__ . '/../includes/auth.php';
 
 requireAdmin();
 
-$pageTitle = 'Gestión de Usuarios';
+$pageTitle = t('Gestión de Usuarios');
 
 $users = getAllUsers();
 
diff --git a/admin_send_message.php b/admin_send_message.php
index ebc55cc..5b96223 100755
--- a/admin_send_message.php
+++ b/admin_send_message.php
@@ -1,6 +1,7 @@
 <?php
 require_once __DIR__ . '/includes/db.php';
 require_once __DIR__ . '/includes/session_check.php';
+require_once __DIR__ . '/includes/i18n.php';
 require_once __DIR__ . '/includes/message_handler.php';
 require_once __DIR__ . '/common/helpers/sender_factory.php';
 require_once __DIR__ . '/common/helpers/converter_factory.php';
diff --git a/chat_telegram.php b/chat_telegram.php
index f81ea84..50f355d 100755
--- a/chat_telegram.php
+++ b/chat_telegram.php
@@ -1,10 +1,11 @@
 <?php
 require_once __DIR__ . '/includes/db.php';
 require_once __DIR__ . '/includes/session_check.php';
+require_once __DIR__ . '/includes/i18n.php';
 
 requireAdmin();
 
-$pageTitle = 'Chat Telegram';
+$pageTitle = t('Chat Telegram');
 
 $interactions = [];
 $selectedUser = $_GET['user_id'] ?? null;
diff --git a/gallery.php b/gallery.php
index 737e86f..7c6e6d5 100755
--- a/gallery.php
+++ b/gallery.php
@@ -1,9 +1,10 @@
 <?php
 require_once __DIR__ . '/includes/db.php';
 require_once __DIR__ . '/includes/session_check.php';
+require_once __DIR__ . '/includes/i18n.php';
 checkSession();
 
-$pageTitle = 'Galería de Imágenes';
+$pageTitle = t('Galería de Imágenes');
 
 $galleryPath = __DIR__ . '/galeria';
 $images = [];
@@ -58,14 +59,14 @@ require_once __DIR__ . '/templates/header.php';
 ?>
 
 <div class="d-flex justify-content-between align-items-center mb-4">
-    <h2><i class="bi bi-images"></i> Galería de Imágenes</h2>
+    <h2><i class="bi bi-images"></i> <?= t('Galería de Imágenes') ?></h2>
     <button class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#uploadModal">
-        <i class="bi bi-upload"></i> Subir Imagen
+        <i class="bi bi-upload"></i> <?= t('Subir Imagen') ?>
     </button>
 </div>
 
 <?php if (empty($images)): ?>
-    <div class="alert alert-info">No hay imágenes en la galería</div>
+    <div class="alert alert-info"><?= t('No hay imágenes en la galería') ?></div>
 <?php else: ?>
     <div class="row">
         <?php foreach ($images as $image): ?>
@@ -75,16 +76,16 @@ require_once __DIR__ . '/templates/header.php';
                 <div class="card-body py-2">
                     <small class="d-block text-truncate"><?= htmlspecialchars($image) ?></small>
                     <div class="btn-group btn-group-sm mt-2">
-                        <button class="btn btn-outline-primary" onclick="copyUrl('<?= urlencode($image) ?>')" title="Copiar URL">
+                        <button class="btn btn-outline-primary" onclick="copyUrl('<?= urlencode($image) ?>')" title="<?= t('Copiar URL') ?>">
                             <i class="bi bi-clipboard"></i>
                         </button>
-                        <button class="btn btn-outline-secondary" onclick="renameImage('<?= htmlspecialchars($image) ?>')" title="Renombrar">
+                        <button class="btn btn-outline-secondary" onclick="renameImage('<?= htmlspecialchars($image) ?>')" title="<?= t('Renombrar') ?>">
                             <i class="bi bi-pencil"></i>
                         </button>
-                        <form method="POST" onsubmit="return confirm('¿Eliminar esta imagen?');" class="d-inline">
+                        <form method="POST" onsubmit="return confirm('<?= t('¿Eliminar esta imagen?') ?>');" class="d-inline">
                             <input type="hidden" name="action" value="delete">
                             <input type="hidden" name="filename" value="<?= htmlspecialchars($image) ?>">
-                            <button type="submit" class="btn btn-outline-danger" title="Eliminar">
+                            <button type="submit" class="btn btn-outline-danger" title="<?= t('Eliminar') ?>">
                                 <i class="bi bi-trash"></i>
                             </button>
                         </form>
diff --git a/profile.php b/profile.php
index f3062be..0504fd0 100755
--- a/profile.php
+++ b/profile.php
@@ -1,11 +1,12 @@
 <?php
 require_once __DIR__ . '/includes/db.php';
 require_once __DIR__ . '/includes/session_check.php';
+require_once __DIR__ . '/includes/i18n.php';
 require_once __DIR__ . '/includes/auth.php';
 
 checkSession();
 
-$pageTitle = 'Mi Perfil';
+$pageTitle = t('Mi Perfil');
 
 $currentUserId = getCurrentUserId();
 if ($currentUserId === 0) {
diff --git a/recurrentes.php b/recurrentes.php
index a1b1987..7ac013a 100755
--- a/recurrentes.php
+++ b/recurrentes.php
@@ -1,10 +1,11 @@
 <?php
 require_once __DIR__ . '/includes/db.php';
 require_once __DIR__ . '/includes/session_check.php';
+require_once __DIR__ . '/includes/i18n.php';
 checkSession();
 require_once __DIR__ . '/includes/activity_logger.php';
 
-$pageTitle = 'Plantillas de Mensajes';
+$pageTitle = t('Plantillas de Mensajes');
 
 $templates = [];
 $galleryImages = [];
@@ -70,9 +71,9 @@ require_once __DIR__ . '/templates/header.php';
 ?>
 
 <div class="d-flex justify-content-between align-items-center mb-4">
-    <h2><i class="bi bi-repeat"></i> Plantillas de Mensajes</h2>
+    <h2><i class="bi bi-collection"></i> <?= t('Plantillas de Mensajes') ?></h2>
     <button class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#templateModal">
-        <i class="bi bi-plus-circle"></i> Nueva Plantilla
+        <i class="bi bi-plus-circle"></i> <?= t('Nueva Plantilla') ?>
     </button>
 </div>
 
@@ -83,19 +84,19 @@ require_once __DIR__ . '/templates/header.php';
 <div class="row">
     <?php if (empty($templates)): ?>
         <div class="col-12">
-            <p class="text-muted text-center py-4">No hay plantillas creadas</p>
+            <p class="text-muted text-center py-4"><?= t('No hay plantillas creadas') ?></p>
         </div>
     <?php else: ?>
         <?php foreach ($templates as $template): ?>
         <div class="col-md-6 mb-4">
             <div class="card border-0 shadow-sm h-100">
-                <div class="card-header bg-white border-0 d-flex justify-content-between align-items-center">
+                <div class="card-header border-0 d-flex justify-content-between align-items-center">
                     <h5 class="mb-0"><?= htmlspecialchars($template['name']) ?></h5>
                     <div class="btn-group btn-group-sm">
                         <button class="btn btn-outline-primary" onclick="editTemplate(<?= htmlspecialchars(json_encode($template)) ?>)">
                             <i class="bi bi-pencil"></i>
                         </button>
-                        <form method="POST" onsubmit="return confirm('¿Eliminar esta plantilla?');" class="d-inline">
+                        <form method="POST" onsubmit="return confirm('<?= t('¿Eliminar esta plantilla?') ?>');" class="d-inline">
                             <input type="hidden" name="action" value="delete">
                             <input type="hidden" name="id" value="<?= $template['id'] ?>">
                             <button type="submit" class="btn btn-outline-danger">
@@ -106,13 +107,13 @@ require_once __DIR__ . '/templates/header.php';
                 </div>
                 <div class="card-body">
                     <p class="text-muted small mb-2">
-                        <i class="bi bi-terminal"></i> Comando: <code>#<?= htmlspecialchars($template['telegram_command'] ?? 'sin comando') ?></code>
+                        <i class="bi bi-terminal"></i> <?= t('Comando') ?>: <code>#<?= htmlspecialchars($template['telegram_command'] ?? t('sin comando')) ?></code>
                     </p>
                     <div class="bg-light p-2 rounded mb-2" style="max-height: 100px; overflow-y: auto; font-size: 0.85rem;">
                         <?= strip_tags(substr($template['message_content'], 0, 200)) ?><?= strlen($template['message_content']) > 200 ? '...' : '' ?>
                     </div>
                     <button class="btn btn-sm btn-outline-info" data-bs-toggle="modal" data-bs-target="#previewModal<?= $template['id'] ?>">
-                        <i class="bi bi-eye"></i> Ver preview
+                        <i class="bi bi-eye"></i> <?= t('Ver preview') ?>
                     </button>
                 </div>
             </div>
diff --git a/sent_messages.php b/sent_messages.php
index eca8f5d..e45ef43 100755
--- a/sent_messages.php
+++ b/sent_messages.php
@@ -1,10 +1,11 @@
 <?php
 require_once __DIR__ . '/includes/db.php';
 require_once __DIR__ . '/includes/session_check.php';
+require_once __DIR__ . '/includes/i18n.php';
 checkSession();
 require_once __DIR__ . '/includes/message_handler.php';
 
-$pageTitle = 'Mensajes Enviados';
+$pageTitle = t('Mensajes Enviados');
 
 $userId = getCurrentUserId();
 $messages = getSentMessages(isAdmin() ? null : $userId, 100);
@@ -13,23 +14,23 @@ require_once __DIR__ . '/templates/header.php';
 ?>
 
 <div class="d-flex justify-content-between align-items-center mb-4">
-    <h2><i class="bi bi-send"></i> Mensajes Enviados</h2>
+    <h2><i class="bi bi-check2-all"></i> <?= t('Mensajes Enviados') ?></h2>
 </div>
 
 <div class="card border-0 shadow-sm">
     <div class="card-body">
         <?php if (empty($messages)): ?>
-            <p class="text-muted text-center py-4">No hay mensajes enviados</p>
+            <p class="text-muted text-center py-4"><?= t('No hay mensajes enviados') ?></p>
         <?php else: ?>
             <div class="table-responsive">
                 <table class="table table-hover">
                     <thead>
                         <tr>
-                            <th>ID</th>
-                            <th>Destinatario</th>
-                            <th>Plataforma</th>
-                            <th>Fecha de Envío</th>
-                            <th>Mensajes Enviados</th>
+                            <th><?= t('ID') ?></th>
+                            <th><?= t('Destinatario') ?></th>
+                            <th><?= t('Plataforma') ?></th>
+                            <th><?= t('Fecha de Envío') ?></th>
+                            <th><?= t('Mensajes Enviados') ?></th>
                         </tr>
                     </thead>
                     <tbody>
diff --git a/set_webhook.php b/set_webhook.php
index eb2865f..f4fc0e2 100755
--- a/set_webhook.php
+++ b/set_webhook.php
@@ -2,10 +2,11 @@
 require_once __DIR__ . '/includes/db.php';
 require_once __DIR__ . '/includes/session_check.php';
 require_once __DIR__ . '/includes/env_loader.php';
+require_once __DIR__ . '/includes/i18n.php';
 
 requireAdmin();
 
-$pageTitle = 'Configurar Webhook de Telegram';
+$pageTitle = t('Configurar Webhook de Telegram');
 
 $results = [];
 $error = '';
diff --git a/telegram/admin/telegram_bot_interactions.php b/telegram/admin/telegram_bot_interactions.php
index 656bf60..af439ad 100755
--- a/telegram/admin/telegram_bot_interactions.php
+++ b/telegram/admin/telegram_bot_interactions.php
@@ -1,11 +1,12 @@
 <?php
 require_once __DIR__ . '/../../includes/db.php';
 require_once __DIR__ . '/../../includes/session_check.php';
+require_once __DIR__ . '/../../includes/i18n.php';
 require_once __DIR__ . '/../../includes/activity_logger.php';
 
 requireAdmin();
 
-$pageTitle = 'Configuración del Bot de Telegram';
+$pageTitle = t('Configuración del Bot de Telegram');
 
 try {
     $pdo = getDbConnection();
diff --git a/telegram/admin/telegram_welcome.php b/telegram/admin/telegram_welcome.php
index da1be1b..fb00641 100755
--- a/telegram/admin/telegram_welcome.php
+++ b/telegram/admin/telegram_welcome.php
@@ -1,11 +1,12 @@
 <?php
 require_once __DIR__ . '/../../includes/db.php';
 require_once __DIR__ . '/../../includes/session_check.php';
+require_once __DIR__ . '/../../includes/i18n.php';
 require_once __DIR__ . '/../../includes/activity_logger.php';
 
 requireAdmin();
 
-$pageTitle = 'Mensajes de Bienvenida por Grupo';
+$pageTitle = t('Mensajes de Bienvenida por Grupo');
 
 try {
     $pdo = getDbConnection();
diff --git a/translate_message.php b/translate_message.php
index b844009..abf4c08 100755
--- a/translate_message.php
+++ b/translate_message.php
@@ -1,11 +1,12 @@
 <?php
 require_once __DIR__ . '/includes/db.php';
 require_once __DIR__ . '/includes/session_check.php';
+require_once __DIR__ . '/includes/i18n.php';
 checkSession();
 require_once __DIR__ . '/includes/env_loader.php';
 require_once __DIR__ . '/src/Translate.php';
 
-$pageTitle = 'Traducir Mensaje';
+$pageTitle = t('Traducir Mensaje');
 
 $sourceText = $_GET['text'] ?? '';
 $sourceLang = $_GET['source_lang'] ?? 'es';