diff --git a/homeassistant/components/media_source/__init__.py b/homeassistant/components/media_source/__init__.py
index 5c6165a3477..e1e9a4feb4b 100644
--- a/homeassistant/components/media_source/__init__.py
+++ b/homeassistant/components/media_source/__init__.py
@@ -33,7 +33,7 @@ from .const import (
     URI_SCHEME,
     URI_SCHEME_REGEX,
 )
-from .error import MediaSourceError, Unresolvable
+from .error import MediaSourceError, UnknownMediaSource, Unresolvable
 from .models import BrowseMediaSource, MediaSource, MediaSourceItem, PlayMedia
 
 __all__ = [
@@ -113,7 +113,11 @@ def _get_media_item(
         return MediaSourceItem(hass, domain, "", target_media_player)
 
     if item.domain is not None and item.domain not in hass.data[DOMAIN]:
-        raise ValueError("Unknown media source")
+        raise UnknownMediaSource(
+            translation_domain=DOMAIN,
+            translation_key="unknown_media_source",
+            translation_placeholders={"domain": item.domain},
+        )
 
     return item
 
@@ -132,7 +136,14 @@ async def async_browse_media(
     try:
         item = await _get_media_item(hass, media_content_id, None).async_browse()
     except ValueError as err:
-        raise BrowseError(str(err)) from err
+        raise BrowseError(
+            translation_domain=DOMAIN,
+            translation_key="browse_media_failed",
+            translation_placeholders={
+                "media_content_id": str(media_content_id),
+                "error": str(err),
+            },
+        ) from err
 
     if content_filter is None or item.children is None:
         return item
@@ -165,7 +176,14 @@ async def async_resolve_media(
     try:
         item = _get_media_item(hass, media_content_id, target_media_player)
     except ValueError as err:
-        raise Unresolvable(str(err)) from err
+        raise Unresolvable(
+            translation_domain=DOMAIN,
+            translation_key="resolve_media_failed",
+            translation_placeholders={
+                "media_content_id": str(media_content_id),
+                "error": str(err),
+            },
+        ) from err
 
     return await item.async_resolve()
 
diff --git a/homeassistant/components/media_source/error.py b/homeassistant/components/media_source/error.py
index 120e7583e23..66e8842e08a 100644
--- a/homeassistant/components/media_source/error.py
+++ b/homeassistant/components/media_source/error.py
@@ -9,3 +9,7 @@ class MediaSourceError(HomeAssistantError):
 
 class Unresolvable(MediaSourceError):
     """When media ID is not resolvable."""
+
+
+class UnknownMediaSource(MediaSourceError, ValueError):
+    """When media source is unknown."""
diff --git a/homeassistant/components/media_source/strings.json b/homeassistant/components/media_source/strings.json
new file mode 100644
index 00000000000..40204fc32db
--- /dev/null
+++ b/homeassistant/components/media_source/strings.json
@@ -0,0 +1,13 @@
+{
+  "exceptions": {
+    "browse_media_failed": {
+      "message": "Failed to browse media with content id {media_content_id}: {error}"
+    },
+    "resolve_media_failed": {
+      "message": "Failed to resolve media with content id {media_content_id}: {error}"
+    },
+    "unknown_media_source": {
+      "message": "Unknown media source: {domain}"
+    }
+  }
+}
diff --git a/tests/components/netatmo/test_media_source.py b/tests/components/netatmo/test_media_source.py
index f9aff2749d2..3d787a1a813 100644
--- a/tests/components/netatmo/test_media_source.py
+++ b/tests/components/netatmo/test_media_source.py
@@ -57,8 +57,10 @@ async def test_async_browse_media(hass: HomeAssistant) -> None:
     # Test invalid base
     with pytest.raises(BrowseError) as excinfo:
         await async_browse_media(hass, f"{URI_SCHEME}{DOMAIN}/")
-    assert str(excinfo.value) == "Invalid media source URI"
-
+    assert str(excinfo.value) == (
+        "Failed to browse media with content id media-source://netatmo/: "
+        "Invalid media source URI"
+    )
     # Test successful listing
     media = await async_browse_media(hass, f"{URI_SCHEME}{DOMAIN}/events")