diff --git a/app/models/translation_override.rb b/app/models/translation_override.rb
index 5862dc5dc7c..5d693ff8534 100644
--- a/app/models/translation_override.rb
+++ b/app/models/translation_override.rb
@@ -44,6 +44,7 @@ class TranslationOverride < ActiveRecord::Base
   validates_presence_of :locale, :translation_key, :value
 
   validate :check_interpolation_keys
+  validate :check_MF_string, if: :message_format?
 
   attribute :status, :integer
   enum status: { up_to_date: 0, outdated: 1, invalid_interpolation_keys: 2, deprecated: 3 }
@@ -165,6 +166,10 @@ class TranslationOverride < ActiveRecord::Base
     I18n.overrides_disabled { I18n.t(transformed_key, locale: :en) }
   end
 
+  def message_format?
+    translation_key.to_s.end_with?("_MF")
+  end
+
   private
 
   def transformed_key
@@ -185,6 +190,14 @@ class TranslationOverride < ActiveRecord::Base
       ),
     )
   end
+
+  def check_MF_string
+    require "messageformat"
+
+    MessageFormat.compile(locale, { key: value }, strict: true)
+  rescue MessageFormat::Compiler::CompileError => e
+    errors.add(:base, e.cause.message)
+  end
 end
 
 # == Schema Information
diff --git a/spec/lib/js_locale_helper_spec.rb b/spec/lib/js_locale_helper_spec.rb
index b918468f5cb..76d77d99e78 100644
--- a/spec/lib/js_locale_helper_spec.rb
+++ b/spec/lib/js_locale_helper_spec.rb
@@ -155,20 +155,10 @@ RSpec.describe JsLocaleHelper do
       )
     end
     fab!(:overriden_translation_ja) do
-      Fabricate(
-        :translation_override,
-        locale: "ja",
-        translation_key: "js.posts_likes_MF",
-        value: "{ count, plural, one {返信 # 件、} other {返信 # 件、} }",
-      )
+      Fabricate(:translation_override, locale: "ja", translation_key: "js.posts_likes_MF")
     end
     fab!(:overriden_translation_he) do
-      Fabricate(
-        :translation_override,
-        locale: "he",
-        translation_key: "js.posts_likes_MF",
-        value: "{ count, plural, ",
-      )
+      Fabricate(:translation_override, locale: "he", translation_key: "js.posts_likes_MF")
     end
     let(:output) { described_class.output_MF(locale).gsub(/^import.*$/, "") }
     let(:generated_locales) { v8_ctx.eval("Object.keys(I18n._mfMessages._data)") }
@@ -176,7 +166,13 @@ RSpec.describe JsLocaleHelper do
       v8_ctx.eval("I18n._mfMessages.get('posts_likes_MF', {count: 3, ratio: 'med'})")
     end
 
-    before { v8_ctx.eval(output) }
+    before do
+      overriden_translation_ja.update_columns(
+        value: "{ count, plural, one {返信 # 件、} other {返信 # 件、} }",
+      )
+      overriden_translation_he.update_columns(value: "{ count, plural, ")
+      v8_ctx.eval(output)
+    end
 
     context "when locale is 'en'" do
       let(:locale) { "en" }
diff --git a/spec/models/translation_override_spec.rb b/spec/models/translation_override_spec.rb
index 4d5ff7d5365..a8da3b88b4a 100644
--- a/spec/models/translation_override_spec.rb
+++ b/spec/models/translation_override_spec.rb
@@ -148,6 +148,32 @@ RSpec.describe TranslationOverride do
         end
       end
     end
+
+    describe "MessageFormat translations" do
+      subject(:override) do
+        described_class.new(
+          translation_key: "admin_js.admin.user.delete_all_posts_confirm_MF",
+          locale: "en",
+        )
+      end
+
+      it do
+        is_expected.to allow_value(
+          "This has {COUNT, plural, one{one member} other{# members}}.",
+        ).for(:value).against(:base)
+      end
+      it do
+        is_expected.not_to allow_value(
+          "This has {COUNT, plural, one{one member} many{# members} other{# members}}.",
+        ).for(:value).with_message(/plural case many is not valid/, against: :base)
+      end
+      it do
+        is_expected.not_to allow_value("This has {COUNT, ").for(:value).with_message(
+          /invalid syntax/,
+          against: :base,
+        )
+      end
+    end
   end
 
   it "upserts values" do
@@ -340,4 +366,20 @@ RSpec.describe TranslationOverride do
       expect(translation.invalid_interpolation_keys).to contain_exactly("foo")
     end
   end
+
+  describe "#message_format?" do
+    subject(:override) { described_class.new(translation_key: key) }
+
+    context "when override is for a MessageFormat translation" do
+      let(:key) { "admin_js.admin.user.delete_all_posts_confirm_MF" }
+
+      it { is_expected.to be_a_message_format }
+    end
+
+    context "when override is not for a MessageFormat translation" do
+      let(:key) { "admin_js.type_to_filter" }
+
+      it { is_expected.not_to be_a_message_format }
+    end
+  end
 end