Use language util to match intent language (#138560)

homeassistant/components/conversation/default_agent.py

@@ -53,6 +53,7 @@ from homeassistant.helpers import (
 )
 from homeassistant.helpers.entity_component import EntityComponent
 from homeassistant.helpers.event import async_track_state_added_domain
+from homeassistant.util import language as language_util
 from homeassistant.util.json import JsonObjectType, json_loads_object
 
 from .chat_log import AssistantContent, async_get_chat_log
@@ -914,26 +915,20 @@ class DefaultAgent(ConversationEntity):
     def _load_intents(self, language: str) -> LanguageIntents | None:
         """Load all intents for language (run inside executor)."""
         intents_dict: dict[str, Any] = {}
-        language_variant: str | None = None
         supported_langs = set(get_languages())
 
         # Choose a language variant upfront and commit to it for custom
         # sentences, etc.
-        all_language_variants = {lang.lower(): lang for lang in supported_langs}
+        lang_matches = language_util.matches(language, supported_langs)
 
-        # en-US, en_US, en, ...
+        if not lang_matches:
-        for maybe_variant in _get_language_variations(language):
-            matching_variant = all_language_variants.get(maybe_variant.lower())
-            if matching_variant:
-                language_variant = matching_variant
-                break
-
-        if not language_variant:
             _LOGGER.warning(
                 "Unable to find supported language variant for %s", language
             )
             return None
 
+        language_variant = lang_matches[0]
+
         # Load intents for this language variant
         lang_variant_intents = get_intents(language_variant, json_load=json_load)
 

tests/components/conversation/test_default_agent.py

@@ -3178,3 +3178,39 @@ async def test_state_names_are_not_translated(
             mock_async_render.call_args.args[0]["state"].state
             == weather.ATTR_CONDITION_PARTLYCLOUDY
         )
+
+
+async def test_language_with_alternative_code(
+    hass: HomeAssistant, init_components
+) -> None:
+    """Test different codes for the same language."""
+    entity_ids: dict[str, str] = {}
+    for i, (lang_code, sentence, name) in enumerate(
+        (
+            ("no", "slå på lampen", "lampen"),  # nb
+            ("no-NO", "slå på lampen", "lampen"),  # nb
+            ("iw", "הדליקי את המנורה", "מנורה"),  # he
+        )
+    ):
+        if not (entity_id := entity_ids.get(name)):
+            # Reuse entity id for the same name
+            entity_id = f"light.test{i}"
+            entity_ids[name] = entity_id
+
+        hass.states.async_set(entity_id, "off", attributes={ATTR_FRIENDLY_NAME: name})
+        calls = async_mock_service(hass, LIGHT_DOMAIN, "turn_on")
+        await hass.services.async_call(
+            "conversation",
+            "process",
+            {
+                conversation.ATTR_TEXT: sentence,
+                conversation.ATTR_LANGUAGE: lang_code,
+            },
+        )
+        await hass.async_block_till_done()
+
+        assert len(calls) == 1, f"Failed for {lang_code}, {sentence}"
+        call = calls[0]
+        assert call.domain == LIGHT_DOMAIN
+        assert call.service == "turn_on"
+        assert call.data == {"entity_id": [entity_id]}