diff --git a/agent/tools/exesql.py b/agent/tools/exesql.py
index ea4ca34b83..e1b586af98 100644
--- a/agent/tools/exesql.py
+++ b/agent/tools/exesql.py
@@ -64,9 +64,9 @@ class ExeSQLParam(ToolParamBase):
         self.check_positive_integer(self.max_records, "Maximum number of records")
         if self.database == "rag_flow":
             if self.host == "ragflow-mysql":
-                raise ValueError("For the security reason, it dose not support database named rag_flow.")
+                raise ValueError("For the security reason, it does not support database named rag_flow.")
             if self.password == "infini_rag_flow":
-                raise ValueError("For the security reason, it dose not support database named rag_flow.")
+                raise ValueError("For the security reason, it does not support database named rag_flow.")
 
     def get_input_form(self) -> dict[str, dict]:
         return {
diff --git a/api/apps/llm_app.py b/api/apps/llm_app.py
index 583e05af7c..d9217eddc3 100644
--- a/api/apps/llm_app.py
+++ b/api/apps/llm_app.py
@@ -326,7 +326,7 @@ async def add_llm():
                 if len(arr) == 0:
                     raise Exception("Not known.")
             except KeyError:
-                msg += f"{factory} dose not support this model({factory}/{mdl_nm})"
+                msg += f"{factory} does not support this model({factory}/{mdl_nm})"
             except Exception as e:
                 msg += f"\nFail to access model({factory}/{mdl_nm})." + str(e)
 
diff --git a/api/apps/restful_apis/dataset_api.py b/api/apps/restful_apis/dataset_api.py
index 55ded90e02..459bf786b8 100644
--- a/api/apps/restful_apis/dataset_api.py
+++ b/api/apps/restful_apis/dataset_api.py
@@ -620,7 +620,7 @@ def delete_index(tenant_id, dataset_id, index_type):
     if index_type not in dataset_api_service._VALID_INDEX_TYPES:
         return get_error_argument_result(f"Invalid index type '{index_type}'")
     # `wipe` controls whether the persisted index artefacts (graph rows /
-    # raptor summaries) are removed.  Default true preserves historical
+    # raptor summaries) are removed. Default true preserves historical
     # behaviour; pass wipe=false to cancel the running task while keeping
     # prior progress so it can be resumed later.
     wipe_arg = (request.args.get("wipe", "true") or "true").strip().lower()
diff --git a/api/db/services/document_service.py b/api/db/services/document_service.py
index bf6ebacbba..2c80e76fc6 100644
--- a/api/db/services/document_service.py
+++ b/api/db/services/document_service.py
@@ -455,7 +455,7 @@ class DocumentService(CommonService):
         chunk_index_name = search.index_name(tenant_id)
         chunk_index_exists = settings.docStoreConn.index_exist(chunk_index_name, doc.kb_id)
 
-        # Cancel all running tasks first Using preset function in task_service.py ---  set cancel flag in Redis
+        # Cancel all running tasks first using preset function in task_service.py --- set cancel flag in Redis
         try:
             cancel_all_task_of(doc.id)
             logging.info(f"Cancelled all tasks for document {doc.id}")
diff --git a/api/db/services/file_service.py b/api/db/services/file_service.py
index 511624799f..7c5945d8af 100644
--- a/api/db/services/file_service.py
+++ b/api/db/services/file_service.py
@@ -705,7 +705,7 @@ class FileService(CommonService):
 
             # Pre-resolve the full redirect chain so that AsyncWebCrawler never
             # follows a server-sent redirect to an unvalidated (potentially
-            # internal) host.  Each hop is SSRF-checked before being followed;
+            # internal) host. Each hop is SSRF-checked before being followed;
             # the validated (hostname, ip) pairs are pinned via Chromium's
             # --host-resolver-rules so the browser cannot re-resolve any of them
             # through a fresh DNS query.
@@ -741,7 +741,7 @@ class FileService(CommonService):
                 )
 
             # Build a single MAP rule string covering every validated hostname
-            # in the redirect chain.  Chromium uses the pinned IP for each,
+            # in the redirect chain. Chromium uses the pinned IP for each,
             # skipping DNS entirely and eliminating the rebinding window.
             _map_rules = ",".join(f"MAP {h} {ip}" for h, ip in host_pins.items())
 
diff --git a/test/testcases/test_web_api/test_llm_app/test_llm_list_unit.py b/test/testcases/test_web_api/test_llm_app/test_llm_list_unit.py
index 8bf9227a5d..53a8705f31 100644
--- a/test/testcases/test_web_api/test_llm_app/test_llm_list_unit.py
+++ b/test/testcases/test_web_api/test_llm_app/test_llm_list_unit.py
@@ -783,7 +783,7 @@ def test_add_llm_model_type_probe_and_persistence_matrix_unit(monkeypatch):
 
     res = _call({"llm_factory": "FRKey", "llm_name": "m", "model_type": module.LLMType.RERANK.value, "verify": True})
     assert res["code"] == 0
-    assert "dose not support this model(FRKey/m)" in res["data"]["message"]
+    assert "does not support this model(FRKey/m)" in res["data"]["message"]
 
     res = _call({"llm_factory": "FRFail", "llm_name": "m", "model_type": module.LLMType.RERANK.value, "verify": True})
     assert res["code"] == 0