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diff --git a/toolkit/components/translations/metrics.yaml b/toolkit/components/translations/metrics.yaml
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+# This Source Code Form is subject to the terms of the Mozilla Public↩
+# License, v. 2.0. If a copy of the MPL was not distributed with this↩
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.↩
+
+# Adding a new metric? We have docs for that!↩
+# https://firefox-source-docs.mozilla.org/toolkit/components/glean/user/new_definitions_file.html↩
+
+---
+$schema: moz://mozilla.org/schemas/glean/metrics/2-0-0
+$tags:
+  - 'Firefox :: Translation'
+
+translations:
+  requests_count:
+    type: counter
+    description: >
+      The count of translation requests.
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1836436
+    data_reviews:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1836436
+    data_sensitivity:
+      - technical
+    notification_emails:
+      - translations-telemetry-alerts@mozilla.com
+    expires: 122
+
+  error_rate:
+    type: rate
+    description: >
+      The rate of failed translations requests.
+    denominator_metric: translations.requests_count
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1836436
+    data_reviews:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1836436
+    data_sensitivity:
+      - technical
+    notification_emails:
+      - translations-telemetry-alerts@mozilla.com
+    expires: 122
+
+  error:
+    type: event
+    description: >
+      The specific translations error that caused a full-page translation failure.
+    extra_keys:
+      reason:
+        type: string
+        description: The reason for the error.
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1836436
+    data_reviews:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1836436
+    data_sensitivity:
+      - technical
+    notification_emails:
+      - translations-telemetry-alerts@mozilla.com
+    expires: 122
+
+  translation_request:
+    type: event
+    description: >
+      Triggers when a full-page translation request is sent.
+    extra_keys:
+      from_language:
+        type: string
+        description: The language being translated from.
+      to_language:
+        type: string
+        description: The language being translated into.
+      auto_translate:
+        type: boolean
+        description: >
+          True if this translation was triggered automatically
+          due to configured always-translate-language settings.
+          False if this translation was triggered manually.
+    bugs:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1836381
+    data_reviews:
+      - https://bugzilla.mozilla.org/show_bug.cgi?id=1836381
+    data_sensitivity:
+      - interaction
+    notification_emails:
+      - translations-telemetry-alerts@mozilla.com
+    expires: 122