Support automatic language selection based on system language (#17953)

* Support automatic language selection

* Handle non-matching keys

* Cleanup

* Handle region specific language codes from browser

* Fix passing in requestor

frigate/embeddings/maintainer.py

@@ -120,7 +120,7 @@ class EmbeddingMaintainer(threading.Thread):
         if self.config.face_recognition.enabled:
             self.realtime_processors.append(
                 FaceRealTimeProcessor(
-                    self.config, self.event_metadata_publisher, metrics
+                    self.config, self.requestor, self.event_metadata_publisher, metrics
                 )
             )