diff --git a/data.js b/data.js
index 09353ba..86d6159 100644
--- a/data.js
+++ b/data.js
@@ -14,6 +14,7 @@ export const sites = [
       en: "Judge Dog",
       ja: "判定犬",
       ko: "판정개",
+      es: "Perro juez",
       meow: "喵喵喵",
     },
     description: {
@@ -22,6 +23,7 @@ export const sites = [
       en: "Online judge platform",
       ja: "オンライン判定サイト",
       ko: "온라인 판정 사이트",
+      es: "Plataforma de jueces en linea",
       meow: "喵喵喵喵喵喵",
     },
     icon: "noto--dog-face.svg",
@@ -34,6 +36,7 @@ export const sites = [
       en: "Self Test Cat",
       ja: "自テスト猫",
       ko: "자가테스트猫",
+      es: "Gato de autoevaluacion",
       meow: "喵喵喵",
     },
     description: {
@@ -42,6 +45,7 @@ export const sites = [
       en: "Code runner",
       ja: "コード実行サイト",
       ko: "코드 실행 사이트",
+      es: "Sitio para ejecutar codigo",
       meow: "喵喵喵喵喵喵",
     },
     icon: "noto--cat-face.svg",
@@ -54,6 +58,7 @@ export const sites = [
       en: "Hakimi",
       ja: "ハキミ",
       ko: "하키미",
+      es: "Hakimi",
       meow: "喵喵喵",
     },
     description: {
@@ -62,6 +67,7 @@ export const sites = [
       en: "Web frontend development",
       ja: "Webフロントエンド開発",
       ko: "웹 프론트엔드 개발",
+      es: "Desarrollo frontend web",
       meow: "喵喵喵喵喵喵喵喵",
     },
     icon: "noto--honeybee.svg",
@@ -74,6 +80,7 @@ export const sites = [
       en: "Practice Duck",
       ja: "演習アヒル",
       ko: "문제풀이오리",
+      es: "Pato de practica",
       meow: "喵喵喵",
     },
     description: {
@@ -82,6 +89,7 @@ export const sites = [
       en: "Practice problems by Mr. Liang",
       ja: "梁先生の演習サイト",
       ko: "량 선생님의 문제풀이 사이트",
+      es: "Sitio de practicas del profe Liang",
       meow: "喵喵喵喵喵喵喵喵",
     },
     icon: "noto--paintbrush.svg",
@@ -94,6 +102,7 @@ export const sites = [
       en: "Coding Books",
       ja: "プログラミング書",
       ko: "프로그래밍 책",
+      es: "Libros de programacion",
       meow: "喵喵喵",
     },
     description: {
@@ -102,6 +111,7 @@ export const sites = [
       en: "CS knowledge summary",
       ja: "プログラミング/コンピュータ知識まとめ",
       ko: "프로그래밍/컴퓨터 지식 모음",
+      es: "Resumen de conocimiento de programacion y computacion",
       meow: "喵喵喵喵喵喵喵喵喵喵喵喵",
     },
     icon: "noto--bookmark-tabs.svg",
@@ -114,6 +124,7 @@ export const sites = [
       en: "Little Blocks",
       ja: "小さなブロック",
       ko: "작은 블록",
+      es: "Bloques pequenos",
       meow: "喵喵喵",
     },
     description: {
@@ -122,6 +133,7 @@ export const sites = [
       en: "Learn coding with blocks",
       ja: "ブロックでプログラミング",
       ko: "블록으로 프로그래밍 배우기",
+      es: "Aprende programacion con bloques",
       meow: "喵喵喵喵喵喵喵",
     },
     icon: "twemoji--brick.svg",
@@ -134,6 +146,7 @@ export const sites = [
       en: "Whiteboard",
       ja: "ホワイトボード",
       ko: "화이트보드",
+      es: "Pizarra",
       meow: "喵喵",
     },
     description: {
@@ -142,6 +155,7 @@ export const sites = [
       en: "Online whiteboard",
       ja: "オンライン板書",
       ko: "온라인 판서",
+      es: "Pizarra en linea",
       meow: "喵喵喵喵",
     },
     icon: "noto--artist-palette.svg",
@@ -154,6 +168,7 @@ export const sites = [
       en: "Python PPT",
       ja: "Python PPT",
       ko: "Python PPT",
+      es: "Python PPT",
       meow: "喵喵喵喵喵喵",
     },
     description: {
@@ -162,6 +177,7 @@ export const sites = [
       en: "Python semester 1 materials",
       ja: "Python 1学期授業用",
       ko: "Python 1학기 수업용",
+      es: "Materiales de Python del primer semestre",
       meow: "喵喵喵喵喵喵喵喵喵喵喵喵喵喵",
     },
     icon: "material-icon-theme--python.svg",
@@ -174,6 +190,7 @@ export const sites = [
       en: "Python Projects",
       ja: "Python プロジェクト",
       ko: "Python 프로젝트",
+      es: "Proyectos de Python",
       meow: "喵喵喵喵喵喵喵喵",
     },
     description: {
@@ -182,6 +199,7 @@ export const sites = [
       en: "Python semester 2 materials",
       ja: "Python 2学期授業用",
       ko: "Python 2학기 수업용",
+      es: "Materiales de Python del segundo semestre",
       meow: "喵喵喵喵喵喵喵",
     },
     icon: "material-icon-theme--folder-python-open.svg",
diff --git a/i18n.js b/i18n.js
index 41c33c7..02fcda0 100644
--- a/i18n.js
+++ b/i18n.js
@@ -59,6 +59,18 @@ export const I18N = {
     beianIcp: "저장 ICP 2023044109",
     beianMps: "저장 공안 33100402331786",
   },
+  es: {
+    appTitle: "Plataforma de aprendizaje en linea de IoT",
+    pinnedSubtitle: "Fijado",
+    designThemeLabel: "Tema de diseno",
+    themeToggleLabel: "Cambiar tema",
+    themeToggleTitle: "Cambiar modo oscuro/claro",
+    moonAlt: "Luna",
+    sunAlt: "Sol",
+    languageLabel: "Idioma",
+    beianIcp: "ICP de Zhejiang 2023044109",
+    beianMps: "Seguridad publica de Zhejiang 33100402331786",
+  },
   meow: {
     appTitle: "喵喵喵喵喵喵喵喵喵喵喵喵",
     pinnedSubtitle: "喵喵喵喵",
@@ -104,6 +116,12 @@ export const DESIGN_THEME_LABELS = {
     terminal: "터미널",
     cyberpunk: "사이버펑크",
   },
+  es: {
+    fluent: "Fluent",
+    "material-you": "Material You",
+    terminal: "Terminal",
+    cyberpunk: "Cyberpunk",
+  },
   meow: {
     fluent: "喵喵",
     "material-you": "喵喵喵",
@@ -118,6 +136,7 @@ export const LANGUAGE_NAMES = {
   en: "English",
   ja: "日本語",
   ko: "한국어",
+  es: "Espanol",
   meow: "喵喵喵",
 }
 
@@ -145,6 +164,7 @@ export function getInitialLanguage() {
   }
   if (normalized.startsWith("ja")) return "ja"
   if (normalized.startsWith("ko")) return "ko"
+  if (normalized.startsWith("es")) return "es"
   return "zh-Hans"
 }
 
diff --git a/index.html b/index.html
index c1b18ca..50f81ff 100644
--- a/index.html
+++ b/index.html
@@ -72,6 +72,7 @@
           </li>
           <li role="option" data-value="ja" aria-selected="false">日本語</li>
           <li role="option" data-value="ko" aria-selected="false">한국어</li>
+          <li role="option" data-value="es" aria-selected="false">Espanol</li>
           <li role="option" data-value="en" aria-selected="false">English</li>
           <li role="option" data-value="meow" aria-selected="false">喵喵喵</li>
         </ul>