diff --git a/homeassistant/components/workday/binary_sensor.py b/homeassistant/components/workday/binary_sensor.py
index 26f44fa1e2d..9cc96db7a57 100644
--- a/homeassistant/components/workday/binary_sensor.py
+++ b/homeassistant/components/workday/binary_sensor.py
@@ -83,6 +83,18 @@ async def async_setup_entry(
             years=year,
             language=language,
         )
+        if (
+            supported_languages := obj_holidays.supported_languages
+        ) and language == "en":
+            for lang in supported_languages:
+                if lang.startswith("en"):
+                    obj_holidays = country_holidays(
+                        country,
+                        subdiv=province,
+                        years=year,
+                        language=lang,
+                    )
+                LOGGER.debug("Changing language from %s to %s", language, lang)
     else:
         obj_holidays = HolidayBase()
 
diff --git a/homeassistant/components/workday/config_flow.py b/homeassistant/components/workday/config_flow.py
index 1fbeea0684d..348bb0c2fba 100644
--- a/homeassistant/components/workday/config_flow.py
+++ b/homeassistant/components/workday/config_flow.py
@@ -18,6 +18,8 @@ from homeassistant.exceptions import HomeAssistantError
 from homeassistant.helpers.selector import (
     CountrySelector,
     CountrySelectorConfig,
+    LanguageSelector,
+    LanguageSelectorConfig,
     NumberSelector,
     NumberSelectorConfig,
     NumberSelectorMode,
@@ -62,14 +64,14 @@ def add_province_and_language_to_schema(
     _country = country_holidays(country=country)
     if country_default_language := (_country.default_language):
         selectable_languages = _country.supported_languages
+        new_selectable_languages = []
+        for lang in selectable_languages:
+            new_selectable_languages.append(lang[:2])
         language_schema = {
             vol.Optional(
                 CONF_LANGUAGE, default=country_default_language
-            ): SelectSelector(
-                SelectSelectorConfig(
-                    options=list(selectable_languages),
-                    mode=SelectSelectorMode.DROPDOWN,
-                )
+            ): LanguageSelector(
+                LanguageSelectorConfig(languages=new_selectable_languages)
             )
         }
 
@@ -109,12 +111,25 @@ def validate_custom_dates(user_input: dict[str, Any]) -> None:
 
     year: int = dt_util.now().year
     if country := user_input.get(CONF_COUNTRY):
+        language = user_input.get(CONF_LANGUAGE)
+        province = user_input.get(CONF_PROVINCE)
         obj_holidays = country_holidays(
             country=country,
-            subdiv=user_input.get(CONF_PROVINCE),
+            subdiv=province,
             years=year,
-            language=user_input.get(CONF_LANGUAGE),
+            language=language,
         )
+        if (
+            supported_languages := obj_holidays.supported_languages
+        ) and language == "en":
+            for lang in supported_languages:
+                if lang.startswith("en"):
+                    obj_holidays = country_holidays(
+                        country,
+                        subdiv=province,
+                        years=year,
+                        language=lang,
+                    )
     else:
         obj_holidays = HolidayBase(years=year)
 
diff --git a/tests/components/workday/__init__.py b/tests/components/workday/__init__.py
index f2744758efb..fb436a57e5c 100644
--- a/tests/components/workday/__init__.py
+++ b/tests/components/workday/__init__.py
@@ -277,3 +277,25 @@ TEST_CONFIG_ADD_REMOVE_DATE_RANGE = {
     "remove_holidays": ["2022-12-04", "2022-12-24,2022-12-26"],
     "language": "de",
 }
+TEST_LANGUAGE_CHANGE = {
+    "name": DEFAULT_NAME,
+    "country": "DE",
+    "province": "BW",
+    "excludes": DEFAULT_EXCLUDES,
+    "days_offset": DEFAULT_OFFSET,
+    "workdays": DEFAULT_WORKDAYS,
+    "add_holidays": ["2022-12-01", "2022-12-05,2022-12-15"],
+    "remove_holidays": ["2022-12-04", "2022-12-24,2022-12-26"],
+    "language": "en",
+}
+TEST_LANGUAGE_NO_CHANGE = {
+    "name": DEFAULT_NAME,
+    "country": "DE",
+    "province": "BW",
+    "excludes": DEFAULT_EXCLUDES,
+    "days_offset": DEFAULT_OFFSET,
+    "workdays": DEFAULT_WORKDAYS,
+    "add_holidays": ["2022-12-01", "2022-12-05,2022-12-15"],
+    "remove_holidays": ["2022-12-04", "2022-12-24,2022-12-26"],
+    "language": "de",
+}
diff --git a/tests/components/workday/test_binary_sensor.py b/tests/components/workday/test_binary_sensor.py
index 6ce5b08ef27..7457d2e0ada 100644
--- a/tests/components/workday/test_binary_sensor.py
+++ b/tests/components/workday/test_binary_sensor.py
@@ -35,6 +35,8 @@ from . import (
     TEST_CONFIG_WITH_PROVINCE,
     TEST_CONFIG_WITH_STATE,
     TEST_CONFIG_YESTERDAY,
+    TEST_LANGUAGE_CHANGE,
+    TEST_LANGUAGE_NO_CHANGE,
     init_integration,
 )
 
@@ -313,3 +315,21 @@ async def test_check_date_service(
         return_response=True,
     )
     assert response == {"binary_sensor.workday_sensor": {"workday": True}}
+
+
+async def test_language_difference_english_language(
+    hass: HomeAssistant,
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    """Test handling difference in English language naming."""
+    await init_integration(hass, TEST_LANGUAGE_CHANGE)
+    assert "Changing language from en to en_US" in caplog.text
+
+
+async def test_language_difference_no_change_other_language(
+    hass: HomeAssistant,
+    caplog: pytest.LogCaptureFixture,
+) -> None:
+    """Test skipping if no difference in language naming."""
+    await init_integration(hass, TEST_LANGUAGE_NO_CHANGE)
+    assert "Changing language from en to en_US" not in caplog.text
diff --git a/tests/components/workday/test_config_flow.py b/tests/components/workday/test_config_flow.py
index 3ecd518ce98..57a7046546e 100644
--- a/tests/components/workday/test_config_flow.py
+++ b/tests/components/workday/test_config_flow.py
@@ -551,7 +551,7 @@ pytestmark = pytest.mark.usefixtures()
     ("language", "holiday"),
     [
         ("de", "Weihnachtstag"),
-        ("en_US", "Christmas"),
+        ("en", "Christmas"),
     ],
 )
 async def test_language(