diff --git a/assemblyai/__version__.py b/assemblyai/__version__.py
index 50122d6..6bf40d5 100644
--- a/assemblyai/__version__.py
+++ b/assemblyai/__version__.py
@@ -1 +1 @@
-__version__ = "0.48.3"
+__version__ = "0.48.4"
diff --git a/assemblyai/types.py b/assemblyai/types.py
index 778aab5..85fd095 100644
--- a/assemblyai/types.py
+++ b/assemblyai/types.py
@@ -172,6 +172,9 @@ class LanguageCode(str, Enum, metaclass=DeprecatedLanguageCodeMeta):
     de = "de"
     "German"
 
+    de_ch = "de_ch"
+    "Swiss German"
+
     en = "en"
     "Global English"
 
@@ -519,6 +522,10 @@ class LanguageDetectionOptions(BaseModel):
         None,
         description='Controls behavior when language confidence is below threshold. Either "error" (default) or "fallback".',
     )
+    swiss_german: Optional[bool] = Field(
+        None,
+        description="If True, route German language requests as Swiss German audio. Only applies when language_detection is enabled and German is detected.",
+    )
 
 
 class CodeSwitchingLanguage(BaseModel):