diff --git a/data.js b/data.js
index 2985bd0..98a9a10 100644
--- a/data.js
+++ b/data.js
@@ -13,6 +13,13 @@ let steps = {
 			type: ""
 		}
 	},
+	language: {
+		title: "V jakém jazyce budete práci tvořit?",
+		layout: language_layout,
+		result: {
+			lang: "cs"
+		}
+	},
 	thesis_title: {
 		title: "Jak se bude práce jmenovat?",
 		layout: thesis_title_layout,
@@ -118,6 +125,15 @@ const theses = {
 	}
 }
 
+const languages = {
+	"cs": {
+		name: "Čeština"
+	},
+	"en": {
+		name: "Angličtina"
+	}
+}
+
 const pronounss = {
 	"masculine": {
 		name: "Mužský rod"
@@ -135,6 +151,7 @@ const typst_header = `#import "template/template.typ": *
 #show: tultemplate2.with(
   faculty: "{faculty.name}",
   document: "{thesis_type.type}",
+  lang: "{language.lang}",
   title: (cs: "{thesis_title.cs}", en: "{thesis_title.en}"),
   author: "{author_info.name}",
   author_pronouns: "{author_info.pronouns}",
diff --git a/styles.css b/styles.css
index d992e1f..c03ad46 100644
--- a/styles.css
+++ b/styles.css
@@ -134,6 +134,10 @@ button:hover, .button:hover {
 	background-color: white;
 }
 
+button.wide, .button.wide {
+	width: 100%;
+}
+
 button.narrow, .button.narrow {
 	padding: 4px 16px;
 	font-size: 16px;
diff --git a/ui.js b/ui.js
index b956e9f..81b722f 100644
--- a/ui.js
+++ b/ui.js
@@ -43,6 +43,25 @@ async function thesis_layout(content, result) {
 	}
 }
 
+async function language_layout(content, result) {
+	if(!Object.keys(languages).includes(result.lang)) {
+		document.querySelector("#next-button").disabled = true;
+	}
+
+	let buttons = new ButtonListBuilder(Object.keys(languages))
+		.should_be_pressed((key) => result.lang == key)
+		.modify((b, key) => b.class("wide").text(languages[key].name))
+		.on_click((key) => {
+			result.lang = key;
+			document.querySelector("#next-button").disabled = false;
+		})
+		.finish();
+
+	for(const button of buttons) {
+		content.appendChild(button);
+	}
+}
+
 async function thesis_title_layout(content, result) {
 	content.appendChild(new TextInputBuilder(result, "cs")
 		.placeholder("Název práce (v češtině)")