Add language_threshold_percent parameter to predict_rows function

main.py

@@ -251,6 +251,7 @@ async def predict_language(
         int, Query(title="Max number of requests to datasets server", gt=0, le=30)
     ] = 10,
     number_of_rows: int = 1000,
+    language_threshold_percent: float = 0.2,
 ) -> dict[Any, Any] | None:
     is_valid = datasets_server_valid_rows(hub_id)
     if not is_valid:
@@ -289,7 +290,11 @@ async def predict_language(
             split,
         )
         logger.info(f"Predicting language for {len(random_rows)} rows")
-        predictions = predict_rows(random_rows, target_column)
+        predictions = predict_rows(
+            random_rows,
+            target_column,
+            language_threshold_percent=language_threshold_percent,
+        )
         predictions["hub_id"] = hub_id
         predictions["config"] = config
         predictions["split"] = split