diff --git a/Gemfile.lock b/Gemfile.lock
index 7a1913abeeb..940c2cf5b75 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -236,7 +236,7 @@ GEM
     memory_profiler (1.0.2)
     message_bus (4.3.8)
       rack (>= 1.1.3)
-    messageformat-wrapper (1.0.0)
+    messageformat-wrapper (1.1.0)
       mini_racer (>= 0.6.3)
     method_source (1.1.0)
     mini_mime (1.1.5)
diff --git a/lib/js_locale_helper.rb b/lib/js_locale_helper.rb
index cfb85f9ddc0..8b396707e1f 100644
--- a/lib/js_locale_helper.rb
+++ b/lib/js_locale_helper.rb
@@ -150,7 +150,7 @@ module JsLocaleHelper
           )
         end
         .compact_blank
-    compiled = MessageFormat.compile(message_formats.keys, message_formats)
+    compiled = MessageFormat.compile(message_formats.keys, message_formats, strict: false)
     transpiled = DiscourseJsProcessor.transpile(<<~JS, "", "discourse-mf")
       import Messages from '@messageformat/runtime/messages';
       #{compiled.sub("export default", "const msgData =")};
diff --git a/spec/lib/js_locale_helper_spec.rb b/spec/lib/js_locale_helper_spec.rb
index 3a9198c2076..b918468f5cb 100644
--- a/spec/lib/js_locale_helper_spec.rb
+++ b/spec/lib/js_locale_helper_spec.rb
@@ -147,18 +147,34 @@ RSpec.describe JsLocaleHelper do
   end
 
   describe ".output_MF" do
-    let(:output) { described_class.output_MF(locale).gsub(/^import.*$/, "") }
-    let(:generated_locales) { v8_ctx.eval("Object.keys(I18n._mfMessages._data)") }
-    let(:translated_message) do
-      v8_ctx.eval("I18n._mfMessages.get('posts_likes_MF', {count: 3, ratio: 'med'})")
-    end
-    let!(:overriden_translation) do
+    fab!(:overriden_translation_en) do
       Fabricate(
         :translation_override,
         translation_key: "admin_js.admin.user.penalty_history_MF",
         value: "OVERRIDEN",
       )
     end
+    fab!(:overriden_translation_ja) do
+      Fabricate(
+        :translation_override,
+        locale: "ja",
+        translation_key: "js.posts_likes_MF",
+        value: "{ count, plural, one {返信 # 件、} other {返信 # 件、} }",
+      )
+    end
+    fab!(:overriden_translation_he) do
+      Fabricate(
+        :translation_override,
+        locale: "he",
+        translation_key: "js.posts_likes_MF",
+        value: "{ count, plural, ",
+      )
+    end
+    let(:output) { described_class.output_MF(locale).gsub(/^import.*$/, "") }
+    let(:generated_locales) { v8_ctx.eval("Object.keys(I18n._mfMessages._data)") }
+    let(:translated_message) do
+      v8_ctx.eval("I18n._mfMessages.get('posts_likes_MF', {count: 3, ratio: 'med'})")
+    end
 
     before { v8_ctx.eval(output) }
 
@@ -227,5 +243,21 @@ RSpec.describe JsLocaleHelper do
         end
       end
     end
+
+    context "when locale contains invalid plural keys" do
+      let(:locale) { "ja" }
+
+      it "does not raise an error" do
+        expect(generated_locales).to match(%w[ja en])
+      end
+    end
+
+    context "when locale contains malformed messages" do
+      let(:locale) { "he" }
+
+      it "raises an error" do
+        expect(output).to match(/Failed to compile message formats/)
+      end
+    end
   end
 end