update baidu language code

deep_translator/constants.py

@@ -285,21 +285,32 @@ LIBRE_LANGUAGES_TO_CODES = {
 }
 
 BAIDU_LANGUAGE_TO_CODE = {
-    "arabic": "ar",
+    "arabic": "ara",
+    "bulgarian": "bul",
+    "chinese (classical)": "wyw",
     "chinese (simplified)": "zh",
-    "chinese (traditional)": "zh-TW",
+    "chinese (traditional)": "cht",
+    "czech": "cs",
+    "danish": "dan",
+    "dutch": "nl",
     "english": "en",
-    "french": "fr",
+    "estonian": "est",
+    "finnish": "fin",
+    "french": "fra",
     "german": "de",
-    "hindi": "hi",
-    "indonesian": "id",
-    "japanese": "ja",
-    "korean": "ko",
-    "malay": "ms",
+    "greek": "el",
+    "hungarian": "hu",
+    "italian": "it",
+    "japanese": "jp",
+    "korean": "kor",
+    "polish": "pl",
     "portuguese": "pt",
+    "romanian": "ro",
     "russian": "ru",
-    "spanish": "es",
+    "slovenian": "slo",
+    "spanish": "spa",
+    "swedish": "swe",
     "thai": "th",
-    "turkish": "tr",
-    "vietnamese": "vi",
+    "vietnamese": "vie",
+    "yueyu": "yue",
 }