Add locale to the client_info section

docs/user/pings/index.md

@@ -52,6 +52,7 @@ Optional fields are marked accordingly.
 | `os_version` | String | The user-visible version of the operating system (e.g. "1.2.3") |
 | `android_sdk_version` | String | *Optional*. The Android specific SDK version of the software running on this hardware device (e.g. "23") |
 | `telemetry_sdk_build` | String | The version of the Glean SDK |
+| `locale` | String | The locale of the application (e.g. "es-ES") |
 
 All the metrics surviving application restarts (e.g. `client_id`, ...) are removed once the application using the Glean SDK is uninstalled.
 

glean-core/android/src/main/java/mozilla/telemetry/glean/Glean.kt

@@ -436,6 +436,7 @@ open class GleanInternalAPI internal constructor () {
         GleanInternalMetrics.deviceManufacturer.setSync(Build.MANUFACTURER)
         GleanInternalMetrics.deviceModel.setSync(Build.MODEL)
         GleanInternalMetrics.architecture.setSync(Build.SUPPORTED_ABIS[0])
+        GleanInternalMetrics.locale.setSync(getLocaleTag())
 
         configuration.channel?.let {
             GleanInternalMetrics.appChannel.setSync(it)

glean-core/ios/Glean/Glean.swift

@@ -137,6 +137,7 @@ public class Glean {
         GleanInternalMetrics.deviceManufacturer.setSync(Sysctl.manufacturer)
         GleanInternalMetrics.deviceModel.setSync(Sysctl.model)
         GleanInternalMetrics.architecture.setSync(Sysctl.machine)
+        GleanInternalMetrics.locale.setSync(getLocaleTag())
 
         if let channel = self.configuration?.channel {
             GleanInternalMetrics.appChannel.setSync(channel)

glean-core/metrics.yaml

@@ -193,6 +193,21 @@ glean.internal.metrics:
       - glean-team@mozilla.com
     expires: never
 
+  locale:
+    type: string
+    lifetime: application
+    send_in_pings:
+      - glean_client_info
+    description: |
+      The locale of the application (e.g. "es-ES").
+    bugs:
+      - https://bugzilla.mozilla.org/1601489
+    data_reviews:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1601489#c3
+    notification_emails:
+      - glean-team@mozilla.com
+    expires: never
+
 glean.error:
   invalid_value:
     type: labeled_counter

glean-core/python/glean/glean.py

@@ -343,6 +343,7 @@ class Glean:
         metrics.glean.internal.metrics.os.set(platform.system())
         metrics.glean.internal.metrics.os_version.set(platform.release())
         metrics.glean.internal.metrics.architecture.set(platform.machine())
+        metrics.glean.internal.metrics.locale.set(util.get_locale_tag())
 
         sysinfo = hardware.get_system_information()
         metrics.glean.internal.metrics.device_manufacturer.set(sysinfo.manufacturer)