diff --git a/langchain/agents/load_tools.py b/langchain/agents/load_tools.py
index 790127ec..780501bb 100644
--- a/langchain/agents/load_tools.py
+++ b/langchain/agents/load_tools.py
@@ -240,7 +240,7 @@ _EXTRA_OPTIONAL_TOOLS = {
     "google-serper": (_get_google_serper, ["serper_api_key"]),
     "serpapi": (_get_serpapi, ["serpapi_api_key", "aiosession"]),
     "searx-search": (_get_searx_search, ["searx_host", "engines", "aiosession"]),
-    "wikipedia": (_get_wikipedia, ["top_k_results"]),
+    "wikipedia": (_get_wikipedia, ["top_k_results", "lang"]),
     "human": (_get_human_tool, ["prompt_func", "input_func"]),
 }
 
diff --git a/langchain/utilities/wikipedia.py b/langchain/utilities/wikipedia.py
index 811a6258..cc6cc6ae 100644
--- a/langchain/utilities/wikipedia.py
+++ b/langchain/utilities/wikipedia.py
@@ -17,6 +17,7 @@ class WikipediaAPIWrapper(BaseModel):
 
     wiki_client: Any  #: :meta private:
     top_k_results: int = 3
+    lang: str = "en"
 
     class Config:
         """Configuration for this pydantic object."""
@@ -29,6 +30,7 @@ class WikipediaAPIWrapper(BaseModel):
         try:
             import wikipedia
 
+            wikipedia.set_lang(values["lang"])
             values["wiki_client"] = wikipedia
         except ImportError:
             raise ValueError(