feat : new environment variable SEARXNG_LANGUAGE , in the persistent config, that you can also edit in Admin > Web Search pannel in case you choose Searxng. This is used in the request to searxng as the "search language" (arguement "language"). Before this feature, it was set to en-US only. Now default is "all". (#19909)

backend/open_webui/retrieval/web/searxng.py

@@ -27,7 +27,7 @@ def search_searxng(
         count (int): The maximum number of results to retrieve from the search.
 
     Keyword Args:
-        language (str): Language filter for the search results; e.g., "en-US". Defaults to an empty string.
+        language (str): Language filter for the search results; e.g., "all", "en-US", "es". Defaults to "all".
         safesearch (int): Safe search filter for safer web results; 0 = off, 1 = moderate, 2 = strict. Defaults to 1 (moderate).
         time_range (str): Time range for filtering results by date; e.g., "2023-04-05..today" or "all-time". Defaults to ''.
         categories: (Optional[list[str]]): Specific categories within which the search should be performed, defaulting to an empty string if not provided.
@@ -40,7 +40,7 @@ def search_searxng(
     """
 
     # Default values for optional parameters are provided as empty strings or None when not specified.
-    language = kwargs.get("language", "en-US")
+    language = kwargs.get("language", "all")
     safesearch = kwargs.get("safesearch", "1")
     time_range = kwargs.get("time_range", "")
     categories = "".join(kwargs.get("categories", []))