diff --git a/public/src/config.js b/public/src/config.js
index 367bfb9..7375b18 100644
--- a/public/src/config.js
+++ b/public/src/config.js
@@ -26,7 +26,7 @@ export function normalizeLanguageCode(lang) {
 	const normalized = lang.toLowerCase().trim();
 
 	// Direct matches
-	const supported = ["en", "zh", "hi", "es", "fr", "ar", "bn", "ru", "pt", "ur", "id", "de", "ja", "sw", "mr", "te", "tr", "zh-tw", "ko"];
+	const supported = ["en", "zh", "hi", "es", "fr", "ar", "bn", "ru", "pt", "ur", "id", "de", "ja", "sw", "mr", "te", "tr", "zh-tw", "ko", "it", "nl", "pl", "vi", "th", "uk", "sv"];
 	if (supported.includes(normalized)) return normalized;
 
 	// Common aliases and variations
@@ -59,6 +59,20 @@ export function normalizeLanguageCode(lang) {
 		"traditional chinese": "zh-tw",
 		"zh_tw": "zh-tw",
 		"korean": "ko",
+		"italian": "it",
+		"italiano": "it",
+		"dutch": "nl",
+		"nederlands": "nl",
+		"polish": "pl",
+		"polski": "pl",
+		"vietnamese": "vi",
+		"tiếng việt": "vi",
+		"thai": "th",
+		"ภาษาไทย": "th",
+		"ukrainian": "uk",
+		"українська": "uk",
+		"swedish": "sv",
+		"svenska": "sv",
 	};
 
 	if (aliases[normalized]) return aliases[normalized];
@@ -116,6 +130,13 @@ export async function getSystemMessage() {
 			tr: "Turkish",
 			"zh-tw": "Chinese (Traditional)",
 			ko: "Korean",
+			it: "Italian",
+			nl: "Dutch",
+			pl: "Polish",
+			vi: "Vietnamese",
+			th: "Thai",
+			uk: "Ukrainian",
+			sv: "Swedish",
 		};
 
 		const langName = langNames[userLang] || userLang;
diff --git a/public/src/translation.js b/public/src/translation.js
index 58efa0b..66c8bb2 100644
--- a/public/src/translation.js
+++ b/public/src/translation.js
@@ -23,6 +23,13 @@ export const SUPPORTED_LANGUAGES = {
 	tr: "Turkish",
 	"zh-tw": "Chinese (Traditional)",
 	ko: "Korean",
+	it: "Italian",
+	nl: "Dutch",
+	pl: "Polish",
+	vi: "Vietnamese",
+	th: "Thai",
+	uk: "Ukrainian",
+	sv: "Swedish",
 };
 
 // REMOVED: splitHTMLIntoChunks function - no longer using chunking
@@ -48,6 +55,13 @@ export const NATIVE_LANGUAGE_NAMES = {
 	tr: "Türkçe",
 	"zh-tw": "中文（繁體）",
 	ko: "한국어",
+	it: "Italiano",
+	nl: "Nederlands",
+	pl: "Polski",
+	vi: "Tiếng Việt",
+	th: "ภาษาไทย",
+	uk: "Українська",
+	sv: "Svenska",
 };
 
 // Send message with custom history (for translation with minimal system prompt)