diff --git a/lib/utils/speech-data/stt-deepgram.js b/lib/utils/speech-data/stt-deepgram.js
index 5c59c10..4c7e0bb 100644
--- a/lib/utils/speech-data/stt-deepgram.js
+++ b/lib/utils/speech-data/stt-deepgram.js
@@ -1,56 +1,153 @@
 module.exports = [
   { name: 'Multilingual', value: 'multi' },
+  { name: 'Afrikaans', value: 'af' },
+  { name: 'Amharic', value: 'am' },
+  { name: 'Arabic', value: 'ar' },
+  { name: 'Assamese', value: 'as' },
+  { name: 'Azerbaijani', value: 'az' },
+  { name: 'Bashkir', value: 'ba' },
+  { name: 'Belarusian', value: 'be' },
   { name: 'Bulgarian', value: 'bg' },
+  { name: 'Bengali', value: 'bn' },
+  { name: 'Tibetan', value: 'bo' },
+  { name: 'Breton', value: 'br' },
+  { name: 'Bosnian', value: 'bs' },
   { name: 'Catalan', value: 'ca' },
-  { name: 'Chinese (Mandarin, Simplified)', value: 'zh' },
-  { name: 'Chinese (Mandarin, Simplified - China)', value: 'zh-CN' },
-  { name: 'Chinese (Mandarin, Simplified - Hans)', value: 'zh-Hans' },
-  { name: 'Chinese (Mandarin, Traditional)', value: 'zh-TW' },
-  { name: 'Chinese (Mandarin, Traditional - Hant)', value: 'zh-Hant' },
-  { name: 'Chinese (Cantonese, Traditional - Hong Kong)', value: 'zh-HK' },
   { name: 'Czech', value: 'cs' },
+  { name: 'Welsh', value: 'cy' },
   { name: 'Danish', value: 'da' },
   { name: 'Danish (Denmark)', value: 'da-DK' },
-  { name: 'Dutch', value: 'nl' },
-  { name: 'English', value: 'en' },
-  { name: 'English (United States)', value: 'en-US' },
-  { name: 'English (Australia)', value: 'en-AU' },
-  { name: 'English (United Kingdom)', value: 'en-GB' },
-  { name: 'English (New Zealand)', value: 'en-NZ' },
-  { name: 'English (India)', value: 'en-IN' },
-  { name: 'Estonian', value: 'et' },
-  { name: 'Finnish', value: 'fi' },
-  { name: 'Flemish', value: 'nl-BE' },
-  { name: 'French', value: 'fr' },
-  { name: 'French (Canada)', value: 'fr-CA' },
   { name: 'German', value: 'de' },
+  { name: 'German (Austria)', value: 'de-AT' },
   { name: 'German (Switzerland)', value: 'de-CH' },
-  { name: 'Greek', value: 'el' },
+  { name: 'German (Germany)', value: 'de-DE' },
+  { name: 'Modern Greek', value: 'el' },
+  { name: 'English', value: 'en' },
+  { name: 'English (Australia)', value: 'en-AU' },
+  { name: 'English (Canada)', value: 'en-CA' },
+  { name: 'English (United Kingdom)', value: 'en-GB' },
+  { name: 'English (Ireland)', value: 'en-IE' },
+  { name: 'English (India)', value: 'en-IN' },
+  { name: 'English (Malaysia)', value: 'en-MY' },
+  { name: 'English (New Zealand)', value: 'en-NZ' },
+  { name: 'English (Philippines)', value: 'en-PH' },
+  { name: 'English (United States)', value: 'en-US' },
+  { name: 'English (South Africa)', value: 'en-ZA' },
+  { name: 'Spanish', value: 'es' },
+  { name: 'Spanish (Latin America and the Caribbean)', value: 'es-419' },
+  { name: 'Spanish (Argentina)', value: 'es-AR' },
+  { name: 'Spanish (Colombia)', value: 'es-CO' },
+  { name: 'Spanish (Spain)', value: 'es-ES' },
+  { name: 'Spanish (Latin America)', value: 'es-LATAM' },
+  { name: 'Spanish (Mexico)', value: 'es-MX' },
+  { name: 'Spanish (United States)', value: 'es-US' },
+  { name: 'Estonian', value: 'et' },
+  { name: 'Basque', value: 'eu' },
+  { name: 'Persian', value: 'fa' },
+  { name: 'Finnish', value: 'fi' },
+  { name: 'Faroese', value: 'fo' },
+  { name: 'French', value: 'fr' },
+  { name: 'French (Belgium)', value: 'fr-BE' },
+  { name: 'French (Canada)', value: 'fr-CA' },
+  { name: 'French (Switzerland)', value: 'fr-CH' },
+  { name: 'French (France)', value: 'fr-FR' },
+  { name: 'French (Canada)', value: 'fr-ca' },
+  { name: 'Galician', value: 'gl' },
+  { name: 'Gujarati', value: 'gu' },
+  { name: 'Hausa', value: 'ha' },
+  { name: 'Hawaiian', value: 'haw' },
+  { name: 'Hebrew', value: 'he' },
   { name: 'Hindi', value: 'hi' },
+  { name: 'Hindi (Latin)', value: 'hi-Latn' },
+  { name: 'Croatian', value: 'hr' },
+  { name: 'Haitian', value: 'ht' },
   { name: 'Hungarian', value: 'hu' },
+  { name: 'Armenian', value: 'hy' },
   { name: 'Indonesian', value: 'id' },
+  { name: 'Indonesian (Indonesia)', value: 'id-ID' },
+  { name: 'Icelandic', value: 'is' },
   { name: 'Italian', value: 'it' },
+  { name: 'Italian (Italy)', value: 'it-IT' },
   { name: 'Japanese', value: 'ja' },
+  { name: 'Japanese (Japan)', value: 'ja-JP' },
+  { name: 'Javanese', value: 'jw' },
+  { name: 'Georgian', value: 'ka' },
+  { name: 'Kazakh', value: 'kk' },
+  { name: 'Khmer', value: 'km' },
+  { name: 'Kannada', value: 'kn' },
   { name: 'Korean', value: 'ko' },
-  { name: 'Korean (South Korea)', value: 'ko-KR' },
-  { name: 'Latvian', value: 'lv' },
+  { name: 'Korean (Republic of Korea)', value: 'ko-KR' },
+  { name: 'Latin', value: 'la' },
+  { name: 'Luxembourgish', value: 'lb' },
+  { name: 'Lingala', value: 'ln' },
+  { name: 'Lao', value: 'lo' },
   { name: 'Lithuanian', value: 'lt' },
+  { name: 'Latvian', value: 'lv' },
+  { name: 'Malagasy', value: 'mg' },
+  { name: 'Maori', value: 'mi' },
+  { name: 'Macedonian', value: 'mk' },
+  { name: 'Malayalam', value: 'ml' },
+  { name: 'Mongolian', value: 'mn' },
+  { name: 'Marathi', value: 'mr' },
   { name: 'Malay', value: 'ms' },
+  { name: 'Malay (Malaysia)', value: 'ms-MY' },
+  { name: 'Malay (Singapore)', value: 'ms-SG' },
+  { name: 'Maltese', value: 'mt' },
+  { name: 'Burmese', value: 'my' },
+  { name: 'Nepali', value: 'ne' },
+  { name: 'Dutch', value: 'nl' },
+  { name: 'Dutch (Belgium)', value: 'nl-BE' },
+  { name: 'Dutch (Netherlands)', value: 'nl-NL' },
+  { name: 'Norwegian Nynorsk', value: 'nn' },
   { name: 'Norwegian', value: 'no' },
+  { name: 'Norwegian (Norway)', value: 'no-NO' },
+  { name: 'Occitan', value: 'oc' },
+  { name: 'Panjabi', value: 'pa' },
   { name: 'Polish', value: 'pl' },
+  { name: 'Polish (Poland)', value: 'pl-PL' },
+  { name: 'Pushto', value: 'ps' },
   { name: 'Portuguese', value: 'pt' },
   { name: 'Portuguese (Brazil)', value: 'pt-BR' },
   { name: 'Portuguese (Portugal)', value: 'pt-PT' },
   { name: 'Romanian', value: 'ro' },
+  { name: 'Romanian (Moldova)', value: 'ro-MD' },
   { name: 'Russian', value: 'ru' },
+  { name: 'Russian (Latin)', value: 'ru-Latn' },
+  { name: 'Russian (Russian Federation)', value: 'ru-RU' },
+  { name: 'Sanskrit', value: 'sa' },
+  { name: 'Sindhi', value: 'sd' },
+  { name: 'Sinhala', value: 'si' },
   { name: 'Slovak', value: 'sk' },
-  { name: 'Spanish', value: 'es' },
-  { name: 'Spanish (Latin America)', value: 'es-419' },
+  { name: 'Slovenian', value: 'sl' },
+  { name: 'Shona', value: 'sn' },
+  { name: 'Somali', value: 'so' },
+  { name: 'Albanian', value: 'sq' },
+  { name: 'Serbian', value: 'sr' },
+  { name: 'Sundanese', value: 'su' },
   { name: 'Swedish', value: 'sv' },
   { name: 'Swedish (Sweden)', value: 'sv-SE' },
+  { name: 'Swahili', value: 'sw' },
+  { name: 'Tamil', value: 'ta' },
+  { name: 'Tamasheq', value: 'taq' },
+  { name: 'Telugu', value: 'te' },
+  { name: 'Tajik', value: 'tg' },
   { name: 'Thai', value: 'th' },
   { name: 'Thai (Thailand)', value: 'th-TH' },
+  { name: 'Turkmen', value: 'tk' },
+  { name: 'Tagalog', value: 'tl' },
   { name: 'Turkish', value: 'tr' },
+  { name: 'Turkish (Türkiye)', value: 'tr-TR' },
+  { name: 'Tatar', value: 'tt' },
   { name: 'Ukrainian', value: 'uk' },
-  { name: 'Vietnamese', value: 'vi' }
+  { name: 'Urdu', value: 'ur' },
+  { name: 'Uzbek', value: 'uz' },
+  { name: 'Vietnamese', value: 'vi' },
+  { name: 'Yiddish', value: 'yi' },
+  { name: 'Yoruba', value: 'yo' },
+  { name: 'Chinese (Mandarin, Mainland)', value: 'zh' },
+  { name: 'Chinese (China)', value: 'zh-CN' },
+  { name: 'Chinese (Cantonese, Hong Kong)', value: 'zh-HK' },
+  { name: 'Chinese (Han (Simplified variant))', value: 'zh-Hans' },
+  { name: 'Chinese (Han (Traditional variant))', value: 'zh-Hant' },
+  { name: 'Chinese (Traditional, Taiwan)', value: 'zh-TW' }
 ];
diff --git a/lib/utils/speech-utils.js b/lib/utils/speech-utils.js
index 73575a6..09439af 100644
--- a/lib/utils/speech-utils.js
+++ b/lib/utils/speech-utils.js
@@ -935,8 +935,30 @@ async function getLanguagesVoicesForDeepgram(credential, getTtsVoices, logger) {
         logger.error({response}, 'Error fetching Deepgram voices');
         throw new Error('failed to list voices');
       }
-      const {stt, tts} = await response.json();
-      let sttLangs = SttDeepgramLanguagesVoices;
+      const {stt, tts, languages} = await response.json();
+      // Helper function to get language name
+      const getLanguageName = (langCode) => {
+        if (languages && languages[langCode]) {
+          return languages[langCode];
+        }
+        const existingLang = SttDeepgramLanguagesVoices.find((l) => l.value === langCode);
+        return existingLang ? existingLang.name : capitalizeFirst(langCode);
+      };
+      // Collect unique languages from selected models
+      const allSttLanguages = new Set();
+      const modelsToProcess = model_id ?
+        stt.filter((m) => m.canonical_name === model_id) :
+        stt;
+      modelsToProcess.forEach((model) => {
+        if (model.languages && Array.isArray(model.languages)) {
+          model.languages.forEach((lang) => allSttLanguages.add(lang));
+        }
+      });
+      // Convert to expected format
+      const sttLangs = Array.from(allSttLanguages).map((langCode) => ({
+        name: getLanguageName(langCode),
+        value: langCode
+      })).sort((a, b) => a.name.localeCompare(b.name));
       const sttModels = Array.from(
         new Map(
           stt.map((m) => [m.canonical_name, { name: capitalizeFirst(m.canonical_name), value: m.canonical_name }])
@@ -947,16 +969,6 @@ async function getLanguagesVoicesForDeepgram(credential, getTtsVoices, logger) {
           tts.map((m) => [m.canonical_name, { name: capitalizeFirst(m.canonical_name), value: m.canonical_name }])
         ).values()
       ).sort((a, b) => a.name.localeCompare(b.name));
-      // if model_id is not provided, return all models, all voices, all languages
-      if (!model_id) {
-        return tranform(TtsLanguagesDeepgram, sttLangs, ttsModels, sttModels);
-      }
-
-      const selectedSttModel = stt.find((m) => m.canonical_name === model_id);
-      const selectedSttLangs = selectedSttModel ? selectedSttModel.languages : [];
-      sttLangs = SttDeepgramLanguagesVoices.filter((l) => {
-        return selectedSttLangs.includes(l.value);
-      });
       return tranform(TtsLanguagesDeepgram, sttLangs, ttsModels, sttModels);
     }
   }