diff --git a/.fern/metadata.json b/.fern/metadata.json
index 076b99b..0f155d5 100644
--- a/.fern/metadata.json
+++ b/.fern/metadata.json
@@ -14,5 +14,5 @@
     },
     "exclude_types_from_init_exports": true
   },
-  "originGitCommit": "6a634e48a5b865d82e50104935887a73a9794836"
+  "originGitCommit": "37ba641a90aa4496eb97146f05555706aaf92670"
 }
\ No newline at end of file
diff --git a/.fern/replay.lock b/.fern/replay.lock
index 8438de8..9c78b96 100644
--- a/.fern/replay.lock
+++ b/.fern/replay.lock
@@ -54,14 +54,20 @@ generations:
     cli_version: unknown
     generator_versions:
       fernapi/fern-python-sdk: 4.37.0
-current_generation: 61e50e75b995a0affce86c308b74caba165c92bb
+  - commit_sha: 48b0250bddbc7acc02cd9da9fa06c1fefe1dd0f7
+    tree_hash: c910ba9b2fa7adc0e4798088edcfbfabbb367571
+    timestamp: 2026-09-01T03:17:57.884Z
+    cli_version: unknown
+    generator_versions:
+      fernapi/fern-python-sdk: 4.37.0
+current_generation: 48b0250bddbc7acc02cd9da9fa06c1fefe1dd0f7
 patches:
   - id: patch-13d8e068
     content_hash: sha256:97d879ab169016b9abaf1866427a8ebc45af608f69e063a07e5126c9613c329b
     original_commit: 13d8e0683ffa08bcfc9a381eb9604adf5abdbe0b
     original_message: "chore: ignore local venv and planning docs"
     original_author: plutoless <qianze.zhang@hotmail.com>
-    base_generation: 61e50e75b995a0affce86c308b74caba165c92bb
+    base_generation: 48b0250bddbc7acc02cd9da9fa06c1fefe1dd0f7
     files:
       - .gitignore
     patch_content: |
@@ -90,7 +96,7 @@ patches:
     original_commit: a065088b4c45e2ca7e1bb91b1a899b8444800121
     original_message: "fix(vendors): send Speechmatics STT key instead of api_key"
     original_author: digitallysavvy <hermes.frangoudis@gmail.com>
-    base_generation: 61e50e75b995a0affce86c308b74caba165c92bb
+    base_generation: 48b0250bddbc7acc02cd9da9fa06c1fefe1dd0f7
     files:
       - src/agora_agent/types/speechmatics_asr_params.py
     patch_content: |
@@ -227,3 +233,4 @@ patches:
                     frozen = True
                     smart_union = True
                     extra = pydantic.Extra.allow
+    user_owned: true
diff --git a/src/agora_agent/types/gemini_asr_params.py b/src/agora_agent/types/gemini_asr_params.py
index b31e0aa..0e9714a 100644
--- a/src/agora_agent/types/gemini_asr_params.py
+++ b/src/agora_agent/types/gemini_asr_params.py
@@ -14,27 +14,27 @@ class GeminiAsrParams(UncheckedBaseModel):
 
     api_key: str = pydantic.Field()
     """
-    Google Gemini API key
+    The Google Gemini API key used to authenticate requests.
     """
 
     model: str = pydantic.Field()
     """
-    Google Gemini model to use for transcription
+    The Gemini transcription model identifier.
     """
 
     sample_rate: typing.Optional[int] = pydantic.Field(default=None)
     """
-    Audio sample rate in Hz
+    The audio sample rate in Hz.
     """
 
-    language: str = pydantic.Field()
+    language: typing.Optional[str] = pydantic.Field(default=None)
     """
-    Language code for speech recognition
+    The language code for speech recognition. This takes precedence over the top-level `asr.language` value.
     """
 
-    word_timestamp: bool = pydantic.Field()
+    word_timestamp: typing.Optional[bool] = pydantic.Field(default=None)
     """
-    Whether to include word-level timestamps in transcription results
+    Whether to include word-level timestamps in the transcription results.
     """
 
     if IS_PYDANTIC_V2: