diff --git a/androidApp/src/main/java/com/mbta/tid/mbta_app/android/MainApplication.kt b/androidApp/src/main/java/com/mbta/tid/mbta_app/android/MainApplication.kt
index 8f8b3c4053..5731fd4667 100644
--- a/androidApp/src/main/java/com/mbta/tid/mbta_app/android/MainApplication.kt
+++ b/androidApp/src/main/java/com/mbta/tid/mbta_app/android/MainApplication.kt
@@ -27,9 +27,14 @@ import org.phoenixframework.Socket
 // expect val appVariant: AppVariant
 
 class MainApplication : Application() {
-    private val socket = Socket(appVariant.socketUrl, decode = ::decodeMessage)
-
     override fun onCreate() {
+        val locale = super.applicationContext.resources.getString(R.string.current_locale)
+        val socket =
+            Socket(
+                appVariant.socketUrl,
+                params = mapOf("locale" to locale),
+                decode = ::decodeMessage,
+            )
         super.onCreate()
         initKoin(
             appVariant,
diff --git a/iosApp/iosApp/ProductionAppView.swift b/iosApp/iosApp/ProductionAppView.swift
index d92933dc9f..636a36f9ca 100644
--- a/iosApp/iosApp/ProductionAppView.swift
+++ b/iosApp/iosApp/ProductionAppView.swift
@@ -94,7 +94,8 @@ struct ProductionAppView: View {
     }
 
     private static func initSocket() -> PhoenixSocket {
-        let socket = Socket(appVariant.socketUrl)
+        let locale = NSLocalizedString("key/current_locale", comment: "")
+        let socket = Socket(appVariant.socketUrl, paramsClosure: { ["locale": locale] })
 
         // decreasing default from 5s
         socket.reconnectAfter = { tries in
diff --git a/shared/src/commonMain/kotlin/com/mbta/tid/mbta_app/model/Alert.kt b/shared/src/commonMain/kotlin/com/mbta/tid/mbta_app/model/Alert.kt
index cdb4a9d035..52bf1d052c 100644
--- a/shared/src/commonMain/kotlin/com/mbta/tid/mbta_app/model/Alert.kt
+++ b/shared/src/commonMain/kotlin/com/mbta/tid/mbta_app/model/Alert.kt
@@ -27,6 +27,7 @@ internal constructor(
     @SerialName("informed_entity") val informedEntity: List<InformedEntity>,
     val lifecycle: Lifecycle,
     val severity: Int,
+    val summaries: List<AlertSummaryEntity>? = null,
     @SerialName("updated_at") val updatedAt: EasternTimeInstant,
     // This field is not parsed from the Alert object from the backend, it is injected from
     // global data in the AlertsUsecase if any informed entities apply to a facility.
diff --git a/shared/src/commonMain/kotlin/com/mbta/tid/mbta_app/model/AlertSummaryEntity.kt b/shared/src/commonMain/kotlin/com/mbta/tid/mbta_app/model/AlertSummaryEntity.kt
new file mode 100644
index 0000000000..7dea885f73
--- /dev/null
+++ b/shared/src/commonMain/kotlin/com/mbta/tid/mbta_app/model/AlertSummaryEntity.kt
@@ -0,0 +1,14 @@
+package com.mbta.tid.mbta_app.model
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+@Serializable
+public data class AlertSummaryEntity(
+    @SerialName("alert_id") val alertId: String,
+    @SerialName("route_id") val routeId: String?,
+    @SerialName("stop_id") val stopId: String?,
+    @SerialName("trip_id") val tripId: String?,
+    @SerialName("direction_id") val directionId: Int?,
+    val summary: String?,
+)
diff --git a/shared/src/commonMain/kotlin/com/mbta/tid/mbta_app/model/ObjectCollectionBuilder.kt b/shared/src/commonMain/kotlin/com/mbta/tid/mbta_app/model/ObjectCollectionBuilder.kt
index a49af033bd..bc8219ee42 100644
--- a/shared/src/commonMain/kotlin/com/mbta/tid/mbta_app/model/ObjectCollectionBuilder.kt
+++ b/shared/src/commonMain/kotlin/com/mbta/tid/mbta_app/model/ObjectCollectionBuilder.kt
@@ -104,6 +104,8 @@ private constructor(
         public var header: String? = null
         public var lifecycle: Alert.Lifecycle = Alert.Lifecycle.New
         public var severity: Int = 0
+
+        public var summaries: List<AlertSummaryEntity>? = null
         public var updatedAt: EasternTimeInstant =
             EasternTimeInstant(Instant.fromEpochMilliseconds(0))
         public var facilities: Map<String, Facility>? = null
@@ -153,6 +155,7 @@ private constructor(
                 informedEntity,
                 lifecycle,
                 severity,
+                summaries,
                 updatedAt,
                 facilities,
             )
diff --git a/shared/src/commonMain/kotlin/com/mbta/tid/mbta_app/phoenix/AlertsChannel.kt b/shared/src/commonMain/kotlin/com/mbta/tid/mbta_app/phoenix/AlertsChannel.kt
index 88f061ff35..5d7c78bd41 100644
--- a/shared/src/commonMain/kotlin/com/mbta/tid/mbta_app/phoenix/AlertsChannel.kt
+++ b/shared/src/commonMain/kotlin/com/mbta/tid/mbta_app/phoenix/AlertsChannel.kt
@@ -4,7 +4,7 @@ import com.mbta.tid.mbta_app.json
 import com.mbta.tid.mbta_app.model.response.AlertsStreamDataResponse
 
 internal object AlertsChannel : ChannelSpec {
-    override val topic = "alerts:v2"
+    override val topic = "alerts:v3"
 
     override val updateEvent = "stream_data"