diff --git a/framework/core/js/tests/unit/common/utils/Translator.test.ts b/framework/core/js/tests/unit/common/utils/Translator.test.ts
index 4983d60993..0d94610e34 100644
--- a/framework/core/js/tests/unit/common/utils/Translator.test.ts
+++ b/framework/core/js/tests/unit/common/utils/Translator.test.ts
@@ -14,8 +14,8 @@ test('placeholders encoding', () => {
 		'test2': 'test2 {placeholder} test2',
 	});
 
-	expect(extractText(translator.trans('test1', {'{placeholder}': "'"}))).toBe("test1 ' test1");
-	expect(extractText(translator.trans('test1', {'{placeholder}': translator.trans('test2', {'{placeholder}': "'"})}))).toBe("test1 test2 ' test2 test1");
+	expect(extractText(translator.trans('test1', {'placeholder': "'"}))).toBe("test1 ' test1");
+	expect(extractText(translator.trans('test1', {'placeholder': translator.trans('test2', {'placeholder': "'"})}))).toBe("test1 test2 ' test2 test1");
 });
 
 test('missing placeholders', () => {
@@ -48,3 +48,16 @@ test('plural rules', () => {
 	expect(extractText(translator.trans('test4', {forumName: 'A & B', pageNumber: 1}))).toBe('A & B');
 	expect(extractText(translator.trans('test4', {forumName: 'A & B', pageNumber: 2}))).toBe('Page 2 - A & B');
 });
+
+test('plural rules 2', () => {
+	const translator = new Translator();
+	translator.setLocale('pl');
+	translator.addTranslations({
+		'test5': '{count, plural, one {# post} few {# posty} many {# postów} other {# posta}}',
+	});
+
+	expect(extractText(translator.trans('test5', {count: 1}))).toBe('1 post');
+	expect(extractText(translator.trans('test5', {count: 2}))).toBe('2 posty');
+	expect(extractText(translator.trans('test5', {count: 5}))).toBe('5 postów');
+	expect(extractText(translator.trans('test5', {count: 1.5}))).toBe('1,5 posta');
+});
diff --git a/framework/core/tests/unit/Locale/TranslatorTest.php b/framework/core/tests/unit/Locale/TranslatorTest.php
index 86057f6297..8fb63bb7b6 100644
--- a/framework/core/tests/unit/Locale/TranslatorTest.php
+++ b/framework/core/tests/unit/Locale/TranslatorTest.php
@@ -73,4 +73,19 @@ public function plural_rules()
         $this->assertSame('A & B', $translator->trans('test4', ['forumName' => 'A & B', 'pageNumber' => 1]));
         $this->assertSame('Page 2 - A & B', $translator->trans('test4', ['forumName' => 'A & B', 'pageNumber' => 2]));
     }
+
+    /** @test */
+    public function plural_rules_2()
+    {
+        $translator = new Translator('pl');
+        $translator->addLoader('array', new ArrayLoader());
+        $translator->addResource('array', [
+            'test4' => '{count, plural, one {# post} few {# posty} many {# postów} other {# posta}}',
+        ], 'pl', self::DOMAIN);
+
+        $this->assertSame('1 post', $translator->trans('test4', ['count' => 1]));
+        $this->assertSame('2 posty', $translator->trans('test4', ['count' => 2]));
+        $this->assertSame('5 postów', $translator->trans('test4', ['count' => 5]));
+        $this->assertSame('1,5 posta', $translator->trans('test4', ['count' => 1.5]));
+    }
 }