diff --git a/homeassistant/components/jewish_calendar/const.py b/homeassistant/components/jewish_calendar/const.py
index 4af76a8927b..0d5455fcd86 100644
--- a/homeassistant/components/jewish_calendar/const.py
+++ b/homeassistant/components/jewish_calendar/const.py
@@ -2,6 +2,9 @@
 
 DOMAIN = "jewish_calendar"
 
+ATTR_DATE = "date"
+ATTR_NUSACH = "nusach"
+
 CONF_DIASPORA = "diaspora"
 CONF_CANDLE_LIGHT_MINUTES = "candle_lighting_minutes_before_sunset"
 CONF_HAVDALAH_OFFSET_MINUTES = "havdalah_minutes_after_sunset"
@@ -11,3 +14,5 @@ DEFAULT_CANDLE_LIGHT = 18
 DEFAULT_DIASPORA = False
 DEFAULT_HAVDALAH_OFFSET_MINUTES = 0
 DEFAULT_LANGUAGE = "english"
+
+SERVICE_COUNT_OMER = "count_omer"
diff --git a/homeassistant/components/jewish_calendar/service.py b/homeassistant/components/jewish_calendar/service.py
index 78855864c6c..faf28e99b1e 100644
--- a/homeassistant/components/jewish_calendar/service.py
+++ b/homeassistant/components/jewish_calendar/service.py
@@ -1,6 +1,7 @@
 """Services for Jewish Calendar."""
 
 import datetime
+from typing import cast
 
 from hdate import HebrewDate
 from hdate.omer import Nusach, Omer
@@ -14,17 +15,20 @@ from homeassistant.core import (
     ServiceResponse,
     SupportsResponse,
 )
-from homeassistant.helpers import config_validation as cv
+from homeassistant.helpers.selector import LanguageSelector, LanguageSelectorConfig
 
-from .const import DOMAIN
+from .const import ATTR_DATE, ATTR_NUSACH, DOMAIN, SERVICE_COUNT_OMER
 
+SUPPORTED_LANGUAGES = {"en": "english", "fr": "french", "he": "hebrew"}
 OMER_SCHEMA = vol.Schema(
     {
-        vol.Required("date", default=datetime.date.today): datetime.date,
-        vol.Required("nusach", default="sfarad"): vol.In(
+        vol.Required(ATTR_DATE, default=datetime.date.today): datetime.date,
+        vol.Required(ATTR_NUSACH, default="sfarad"): vol.In(
             [nusach.name.lower() for nusach in Nusach]
         ),
-        vol.Required(CONF_LANGUAGE, default="he"): cv.language,
+        vol.Required(CONF_LANGUAGE, default="he"): LanguageSelector(
+            LanguageSelectorConfig(languages=list(SUPPORTED_LANGUAGES.keys()))
+        ),
     }
 )
 
@@ -36,15 +40,10 @@ def async_setup_services(hass: HomeAssistant) -> None:
         """Return the Omer blessing for a given date."""
         hebrew_date = HebrewDate.from_gdate(call.data["date"])
         nusach = Nusach[call.data["nusach"].upper()]
-        _language = call.data[CONF_LANGUAGE]
 
         # Currently Omer only supports Hebrew, English, and French and requires
         # the full language name
-        language: Language = "hebrew"
-        if _language == "en":
-            language = "english"
-        elif _language == "fr":
-            language = "french"
+        language = cast(Language, SUPPORTED_LANGUAGES[call.data[CONF_LANGUAGE]])
 
         omer = Omer(date=hebrew_date, nusach=nusach, language=language)
         return {
@@ -57,7 +56,7 @@ def async_setup_services(hass: HomeAssistant) -> None:
 
     hass.services.async_register(
         DOMAIN,
-        "count_omer",
+        SERVICE_COUNT_OMER,
         get_omer_count,
         schema=OMER_SCHEMA,
         supports_response=SupportsResponse.ONLY,