From 0b2db2510f1fc0707b752764eec386dd90a1549b Mon Sep 17 00:00:00 2001
From: karwosts <32912880+karwosts@users.noreply.github.com>
Date: Fri, 4 Jul 2025 11:06:33 -0700
Subject: [PATCH] Support translating number selector UoM (#148162)

---
 homeassistant/components/derivative/config_flow.py | 1 +
 homeassistant/components/derivative/strings.json   | 5 +++++
 homeassistant/helpers/selector.py                  | 2 ++
 script/hassfest/translations.py                    | 4 ++++
 tests/helpers/test_selector.py                     | 8 +++++++-
 5 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/homeassistant/components/derivative/config_flow.py b/homeassistant/components/derivative/config_flow.py
index 37d54e04f7f..dc12e1bbfe2 100644
--- a/homeassistant/components/derivative/config_flow.py
+++ b/homeassistant/components/derivative/config_flow.py
@@ -94,6 +94,7 @@ async def _get_options_dict(handler: SchemaCommonFlowHandler | None) -> dict:
                 max=6,
                 mode=selector.NumberSelectorMode.BOX,
                 unit_of_measurement="decimals",
+                translation_key="round",
             ),
         ),
         vol.Required(CONF_TIME_WINDOW): selector.DurationSelector(),
diff --git a/homeassistant/components/derivative/strings.json b/homeassistant/components/derivative/strings.json
index 5081e7f3b35..551d0912a94 100644
--- a/homeassistant/components/derivative/strings.json
+++ b/homeassistant/components/derivative/strings.json
@@ -52,6 +52,11 @@
         "h": "Hours",
         "d": "Days"
       }
+    },
+    "round": {
+      "unit_of_measurement": {
+        "decimals": "decimals"
+      }
     }
   }
 }
diff --git a/homeassistant/helpers/selector.py b/homeassistant/helpers/selector.py
index e4277aac98e..4fa31ee78a2 100644
--- a/homeassistant/helpers/selector.py
+++ b/homeassistant/helpers/selector.py
@@ -1066,6 +1066,7 @@ class NumberSelectorConfig(BaseSelectorConfig, total=False):
     step: float | Literal["any"]
     unit_of_measurement: str
     mode: NumberSelectorMode
+    translation_key: str
 
 
 class NumberSelectorMode(StrEnum):
@@ -1106,6 +1107,7 @@ class NumberSelector(Selector[NumberSelectorConfig]):
                 vol.Optional(CONF_MODE, default=NumberSelectorMode.SLIDER): vol.All(
                     vol.Coerce(NumberSelectorMode), lambda val: val.value
                 ),
+                vol.Optional("translation_key"): str,
             }
         ),
         validate_slider,
diff --git a/script/hassfest/translations.py b/script/hassfest/translations.py
index 4e0cf349aec..974c932ae5c 100644
--- a/script/hassfest/translations.py
+++ b/script/hassfest/translations.py
@@ -310,6 +310,10 @@ def gen_strings_schema(config: Config, integration: Integration) -> vol.Schema:
                         translation_value_validator,
                         slug_validator=translation_key_validator,
                     ),
+                    vol.Optional("unit_of_measurement"): cv.schema_with_slug_keys(
+                        translation_value_validator,
+                        slug_validator=translation_key_validator,
+                    ),
                     vol.Optional("fields"): cv.schema_with_slug_keys(str),
                 },
                 slug_validator=vol.Any("_", cv.slug),
diff --git a/tests/helpers/test_selector.py b/tests/helpers/test_selector.py
index 8947ea8099c..dd8cd1c1b64 100644
--- a/tests/helpers/test_selector.py
+++ b/tests/helpers/test_selector.py
@@ -396,7 +396,13 @@ def test_assist_pipeline_selector_schema(
         ({"min": -100, "max": 100, "step": 5}, (), ()),
         ({"min": -20, "max": -10, "mode": "box"}, (), ()),
         (
-            {"min": 0, "max": 100, "unit_of_measurement": "seconds", "mode": "slider"},
+            {
+                "min": 0,
+                "max": 100,
+                "unit_of_measurement": "seconds",
+                "mode": "slider",
+                "translation_key": "foo",
+            },
             (),
             (),
         ),