diff --git a/taskcluster/ci/release-eme-free-repack/kind.yml b/taskcluster/ci/release-eme-free-repack/kind.yml
index ef38ab4a409c..e84be109488c 100644
--- a/taskcluster/ci/release-eme-free-repack/kind.yml
+++ b/taskcluster/ci/release-eme-free-repack/kind.yml
@@ -41,6 +41,13 @@ job-defaults:
       job-script: taskcluster/scripts/builder/repackage.sh
       need-xvfb: false
       tooltool-downloads: false
+   extra:
+      limit-locales:
+         by-project:
+            birch: true
+            jamun: true
+            maple: true
+            default: false
 
 jobs:
    macosx64-nightly:
diff --git a/taskcluster/ci/release-partner-repack/kind.yml b/taskcluster/ci/release-partner-repack/kind.yml
index 492fbb800f7b..72b65e4ab7f1 100644
--- a/taskcluster/ci/release-partner-repack/kind.yml
+++ b/taskcluster/ci/release-partner-repack/kind.yml
@@ -41,6 +41,13 @@ job-defaults:
       job-script: taskcluster/scripts/builder/repackage.sh
       need-xvfb: false
       tooltool-downloads: false
+   extra:
+      limit-locales:
+         by-project:
+            birch: true
+            jamun: true
+            maple: true
+            default: false
 
 jobs:
    linux-nightly:
diff --git a/taskcluster/taskgraph/transforms/partner_repack.py b/taskcluster/taskgraph/transforms/partner_repack.py
index c3b2fb26f22f..17b76d3bdeb8 100644
--- a/taskcluster/taskgraph/transforms/partner_repack.py
+++ b/taskcluster/taskgraph/transforms/partner_repack.py
@@ -23,6 +23,10 @@ def resolve_properties(config, tasks):
             property = "worker.env.{}".format(property)
             resolve_keyed_by(task, property, property, **config.params)
 
+        for property in ("limit-locales", ):
+            property = "extra.{}".format(property)
+            resolve_keyed_by(task, property, property, **config.params)
+
         if task['worker']['env']['REPACK_MANIFESTS_URL'].startswith('git@'):
             task.setdefault('scopes', []).append(
                 'secrets:get:project/releng/gecko/build/level-{level}/partner-github-ssh'.format(
@@ -43,6 +47,11 @@ def make_label(config, tasks):
 @transforms.add
 def add_command_arguments(config, tasks):
     release_config = get_release_config(config)
+    all_locales = set()
+    for partner_class in config.params['release_partner_config'].values():
+        for partner in partner_class.values():
+            for sub_partner in partner.values():
+                all_locales.update(sub_partner.get('locales', []))
     for task in tasks:
         # add the MOZHARNESS_OPTIONS, eg version=61.0, build-number=1, platform=win64
         task['run']['options'] = [
@@ -50,6 +59,9 @@ def add_command_arguments(config, tasks):
             'build-number={}'.format(release_config['build_number']),
             'platform={}'.format(task['attributes']['build_platform'].split('-')[0]),
         ]
+        if task['extra']['limit-locales']:
+            for locale in all_locales:
+                task['run']['options'].append('limit-locale={}'.format(locale))
 
         # The upstream taskIds are stored a special environment variable, because we want to use
         # task-reference's to resolve dependencies, but the string handling of MOZHARNESS_OPTIONS
diff --git a/testing/mozharness/scripts/desktop_partner_repacks.py b/testing/mozharness/scripts/desktop_partner_repacks.py
index 482bce5dce35..e12c5a060c2a 100755
--- a/testing/mozharness/scripts/desktop_partner_repacks.py
+++ b/testing/mozharness/scripts/desktop_partner_repacks.py
@@ -56,6 +56,10 @@ class DesktopPartnerRepacks(ReleaseMixin, BuildbotMixin, PurgeMixin,
             "action": "extend",
             "help": "taskId(s) of upstream tasks for vanilla Firefox artifacts",
         }],
+        [["--limit-locale", "-l"], {
+            "dest": "limitLocales",
+            "action": "append",
+        }],
     ]
 
     def __init__(self):
@@ -162,6 +166,9 @@ class DesktopPartnerRepacks(ReleaseMixin, BuildbotMixin, PurgeMixin,
         if self.config.get('taskIds'):
             for taskId in self.config['taskIds']:
                 repack_cmd.extend(["--taskid", taskId])
+        if self.config.get("limitLocales"):
+            for locale in self.config["limitLocales"]:
+                repack_cmd.extend(["--limit-locale", locale])
 
         return self.run_command(repack_cmd,
                                 cwd=self.query_abs_dirs()['abs_scripts_dir'])