Fix language handling in jewish_calendar tests (#171383)

tests/components/jewish_calendar/conftest.py

@@ -7,7 +7,7 @@ from unittest.mock import AsyncMock, patch
 
 from freezegun import freeze_time
 from freezegun.api import FrozenDateTimeFactory
-from hdate.translator import set_language
+from hdate.translator import get_language, set_language
 import pytest
 
 from homeassistant.components.calendar import (
@@ -89,10 +89,13 @@ def _test_time(
 @pytest.fixture
 def results(
     request: pytest.FixtureRequest, tz_info: dt.tzinfo, language: str
-) -> Iterable:
+) -> Generator[Iterable | None]:
     """Return localized results."""
     if not hasattr(request, "param"):
-        return None
+        yield None
+        return
+
+    previous_language = get_language()
 
     # If results are generated, by using the HDate library, we need to set the language
     set_language(language)
@@ -109,8 +112,11 @@ def results(
                 key: value() if callable(value) else value
                 for key, value in result["attr"].items()
             }
-        return result
-    return request.param
+        yield result
+    else:
+        yield request.param
+
+    set_language(previous_language)
 
 
 @pytest.fixture