diff --git a/CHANGELOG.md b/CHANGELOG.md
index f5c87c1ec..0c5c30b0e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- Added new language support for `AWSTranscribeSTTService`. All languages
+  supporting streaming data input are now supported:
+  https://docs.aws.amazon.com/transcribe/latest/dg/supported-languages.html
+
 - The development runner how handles custom `body` data for `DailyTransport`.
   The `body` data is passed to the Pipecat client. You can POST to the `/start`
   endpoint with a request body of:
diff --git a/src/pipecat/services/aws/stt.py b/src/pipecat/services/aws/stt.py
index 57cd391b6..f67f0979f 100644
--- a/src/pipecat/services/aws/stt.py
+++ b/src/pipecat/services/aws/stt.py
@@ -314,6 +314,10 @@ class AWSTranscribeSTTService(STTService):
     def language_to_service_language(self, language: Language) -> str | None:
         """Convert internal language enum to AWS Transcribe language code.
 
+        Source:
+        https://docs.aws.amazon.com/transcribe/latest/dg/supported-languages.html
+        All language codes that support streaming are included.
+
         Args:
             language: Internal language enumeration value.
 
@@ -321,17 +325,145 @@ class AWSTranscribeSTTService(STTService):
             AWS Transcribe compatible language code, or None if unsupported.
         """
         language_map = {
-            Language.EN: "en-US",
-            Language.ES: "es-US",
-            Language.FR: "fr-FR",
-            Language.DE: "de-DE",
+            # Afrikaans
+            Language.AF: "af-ZA",
+            Language.AF_ZA: "af-ZA",
+            # Arabic
+            Language.AR: "ar-SA",  # Default to Modern Standard Arabic
+            Language.AR_AE: "ar-AE",  # Gulf Arabic
+            Language.AR_SA: "ar-SA",  # Modern Standard Arabic
+            # Basque
+            Language.EU: "eu-ES",
+            Language.EU_ES: "eu-ES",
+            # Catalan
+            Language.CA: "ca-ES",
+            Language.CA_ES: "ca-ES",
+            # Chinese
+            Language.ZH: "zh-CN",  # Default to Simplified
+            Language.ZH_CN: "zh-CN",  # Simplified
+            Language.ZH_TW: "zh-TW",  # Traditional
+            Language.ZH_HK: "zh-HK",  # Cantonese (also yue-HK)
+            Language.YUE: "zh-HK",  # Cantonese fallback
+            # Croatian
+            Language.HR: "hr-HR",
+            Language.HR_HR: "hr-HR",
+            # Czech
+            Language.CS: "cs-CZ",
+            Language.CS_CZ: "cs-CZ",
+            # Danish
+            Language.DA: "da-DK",
+            Language.DA_DK: "da-DK",
+            # Dutch
+            Language.NL: "nl-NL",
+            Language.NL_NL: "nl-NL",
+            # English
+            Language.EN: "en-US",  # Default to US
+            Language.EN_AU: "en-AU",  # Australian
+            Language.EN_GB: "en-GB",  # British
+            Language.EN_IN: "en-IN",  # Indian
+            Language.EN_IE: "en-IE",  # Irish
+            Language.EN_NZ: "en-NZ",  # New Zealand
+            # Note: Scottish (en-AB) and Welsh (en-WL) don't have direct Language enum matches
+            Language.EN_ZA: "en-ZA",  # South African
+            Language.EN_US: "en-US",  # US
+            # Persian/Farsi
+            Language.FA: "fa-IR",
+            Language.FA_IR: "fa-IR",
+            # Finnish
+            Language.FI: "fi-FI",
+            Language.FI_FI: "fi-FI",
+            # French
+            Language.FR: "fr-FR",  # Default to France
+            Language.FR_FR: "fr-FR",
+            Language.FR_CA: "fr-CA",  # Canadian
+            # Galician
+            Language.GL: "gl-ES",
+            Language.GL_ES: "gl-ES",
+            # Georgian
+            Language.KA: "ka-GE",
+            Language.KA_GE: "ka-GE",
+            # German
+            Language.DE: "de-DE",  # Default to Germany
+            Language.DE_DE: "de-DE",
+            Language.DE_CH: "de-CH",  # Swiss
+            # Greek
+            Language.EL: "el-GR",
+            Language.EL_GR: "el-GR",
+            # Hebrew
+            Language.HE: "he-IL",
+            Language.HE_IL: "he-IL",
+            # Hindi
+            Language.HI: "hi-IN",
+            Language.HI_IN: "hi-IN",
+            # Indonesian
+            Language.ID: "id-ID",
+            Language.ID_ID: "id-ID",
+            # Italian
             Language.IT: "it-IT",
-            Language.PT: "pt-BR",
+            Language.IT_IT: "it-IT",
+            # Japanese
             Language.JA: "ja-JP",
+            Language.JA_JP: "ja-JP",
+            # Korean
             Language.KO: "ko-KR",
-            Language.ZH: "zh-CN",
+            Language.KO_KR: "ko-KR",
+            # Latvian
+            Language.LV: "lv-LV",
+            Language.LV_LV: "lv-LV",
+            # Malay
+            Language.MS: "ms-MY",
+            Language.MS_MY: "ms-MY",
+            # Norwegian
+            Language.NB: "no-NO",  # Norwegian Bokmål
+            Language.NB_NO: "no-NO",
+            Language.NO: "no-NO",
+            # Polish
             Language.PL: "pl-PL",
+            Language.PL_PL: "pl-PL",
+            # Portuguese
+            Language.PT: "pt-PT",  # Default to Portugal
+            Language.PT_PT: "pt-PT",
+            Language.PT_BR: "pt-BR",  # Brazilian
+            # Romanian
+            Language.RO: "ro-RO",
+            Language.RO_RO: "ro-RO",
+            # Russian
+            Language.RU: "ru-RU",
+            Language.RU_RU: "ru-RU",
+            # Serbian
+            Language.SR: "sr-RS",
+            Language.SR_RS: "sr-RS",
+            # Slovak
+            Language.SK: "sk-SK",
+            Language.SK_SK: "sk-SK",
+            # Somali
+            Language.SO: "so-SO",
+            Language.SO_SO: "so-SO",
+            # Spanish
+            Language.ES: "es-ES",  # Default to Spain
+            Language.ES_ES: "es-ES",
+            Language.ES_US: "es-US",  # US Spanish
+            # Swedish
+            Language.SV: "sv-SE",
+            Language.SV_SE: "sv-SE",
+            # Tagalog/Filipino
+            Language.TL: "tl-PH",
+            Language.FIL: "tl-PH",  # Filipino maps to Tagalog
+            Language.FIL_PH: "tl-PH",
+            # Thai
+            Language.TH: "th-TH",
+            Language.TH_TH: "th-TH",
+            # Ukrainian
+            Language.UK: "uk-UA",
+            Language.UK_UA: "uk-UA",
+            # Vietnamese
+            Language.VI: "vi-VN",
+            Language.VI_VN: "vi-VN",
+            # Zulu
+            Language.ZU: "zu-ZA",
+            Language.ZU_ZA: "zu-ZA",
         }
+
         return language_map.get(language)
 
     @traced_stt