--- a/taskcluster/ci/source-test/mozlint.yml
+++ b/taskcluster/ci/source-test/mozlint.yml
@@ -137,8 +137,27 @@ yaml:
         mach: lint -l yaml -f treeherder
     when:
         files-changed:
             - '**/*.yml'
             - '**/*.yaml'
             - '**/.ymllint'
             - 'python/mozlint/**'
             - 'tools/lint/**'
+
+l10n:
+    description: l10n tests for strings with errors and conflicts with cross-channel
+    platform: lint/opt
+    treeherder:
+        symbol: l10n
+        kind: test
+        tier: 2
+    worker-type: aws-provisioner-v1/gecko-t-linux-xlarge
+    worker:
+        docker-image: {in-tree: "lint"}
+        max-run-time: 1800
+    run:
+        using: mach
+        mach: lint -l l10n -f treeherder
+    when:
+        files-changed:
+            - '**/locales/en-US/**'
+            - 'tools/lint/**'