diff --git a/Flow.Launcher.Infrastructure/UserSettings/Settings.cs b/Flow.Launcher.Infrastructure/UserSettings/Settings.cs
index 726a0023b..271f618da 100644
--- a/Flow.Launcher.Infrastructure/UserSettings/Settings.cs
+++ b/Flow.Launcher.Infrastructure/UserSettings/Settings.cs
@@ -514,7 +514,7 @@ namespace Flow.Launcher.Infrastructure.UserSettings
             {
                 var list = FixedHotkeys();
 
-                // Customizeable hotkeys
+                // Customizable hotkeys
                 if (!string.IsNullOrEmpty(Hotkey))
                     list.Add(new(Hotkey, "flowlauncherHotkey", () => Hotkey = ""));
                 if (!string.IsNullOrEmpty(PreviewHotkey))
diff --git a/Flow.Launcher.Test/ChineseDetectionPerformanceTest.cs b/Flow.Launcher.Test/ChineseDetectionPerformanceTest.cs
new file mode 100644
index 000000000..1747f2b4a
--- /dev/null
+++ b/Flow.Launcher.Test/ChineseDetectionPerformanceTest.cs
@@ -0,0 +1,265 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using NUnit.Framework;
+using NUnit.Framework.Legacy;
+using Flow.Launcher.Infrastructure;
+using ToolGood.Words.Pinyin;
+
+namespace Flow.Launcher.Test
+{
+    /// <summary>
+    /// Performance test comparing ContainsChinese() vs WordsHelper.HasChinese()
+    /// 
+    /// This test verifies:
+    /// 1. Both methods produce identical results (correctness)
+    /// 2. Performance characteristics of both implementations
+    /// 3. Memory allocation patterns
+    /// 
+    /// The ContainsChinese() method uses optimized Unicode range checking with ReadOnlySpan
+    /// while WordsHelper.HasChinese() uses the ToolGood.Words library implementation.
+    /// </summary>
+    [TestFixture]
+    public class ChineseDetectionPerformanceTest
+    {
+        private readonly List<string> _testStrings = new()
+        {
+            // Pure English - should return false
+            "Hello World",
+            "Visual Studio Code",
+            "Microsoft Office 2023",
+            "Adobe Photoshop Creative Suite",
+            "Google Chrome Browser Application",
+            
+            // Pure Chinese - should return true
+            "你好世界",
+            "微软办公软件", 
+            "谷歌浏览器",
+            "北京大学计算机科学与技术学院",
+            "中华人民共和国国家发展和改革委员会",
+            
+            // Mixed content - should return true
+            "Hello 世界",
+            "Visual Studio 代码编辑器",
+            "QQ音乐 Music Player", 
+            "Windows 10 操作系统",
+            "GitHub 代码仓库管理平台",
+            
+            // Edge cases
+            "",
+            " ",
+            "123456",
+            "!@#$%^&*()",
+            "café résumé naïve", // Accented characters (not Chinese)
+            
+            // Long strings for performance testing
+            "This is a very long English string that contains no Chinese characters but is designed to test performance with longer text content that might appear in file names or application descriptions",
+            "这是一个非常长的中文字符串，包含了很多汉字，用来测试在处理较长中文文本时的性能表现，比如可能出现在文件名或应用程序描述中的文本内容",
+            "This is a mixed 混合内容的字符串 that contains both English and Chinese characters 中英文混合 to test performance with 复杂的文本内容 in real-world scenarios 真实场景中的应用"
+        };
+
+        [Test]
+        public void ContainsChinese_CorrectnessTest()
+        {
+            // Verify ContainsChinese works correctly for known cases
+            ClassicAssert.IsFalse(ContainsChinese("Hello World"), "Pure English should return false");
+            ClassicAssert.IsTrue(ContainsChinese("你好世界"), "Pure Chinese should return true");
+            ClassicAssert.IsTrue(ContainsChinese("Hello 世界"), "Mixed content should return true");
+            ClassicAssert.IsFalse(ContainsChinese(""), "Empty string should return false");
+            ClassicAssert.IsFalse(ContainsChinese("123456"), "Numbers should return false");
+            ClassicAssert.IsFalse(ContainsChinese("café résumé"), "Accented characters should return false");
+        }
+
+        [Test]
+        public void WordsHelper_CorrectnessTest()
+        {
+            // Verify WordsHelper.HasChinese works correctly for known cases
+            ClassicAssert.IsFalse(WordsHelper.HasChinese("Hello World"), "Pure English should return false");
+            ClassicAssert.IsTrue(WordsHelper.HasChinese("你好世界"), "Pure Chinese should return true");
+            ClassicAssert.IsTrue(WordsHelper.HasChinese("Hello 世界"), "Mixed content should return true");
+            ClassicAssert.IsFalse(WordsHelper.HasChinese(""), "Empty string should return false");
+            ClassicAssert.IsFalse(WordsHelper.HasChinese("123456"), "Numbers should return false");
+            ClassicAssert.IsFalse(WordsHelper.HasChinese("café résumé"), "Accented characters should return false");
+        }
+
+        [Test]
+        public void BothMethods_ShouldProduceSameResults()
+        {
+            // Critical test: verify both methods produce identical results for all test cases
+            foreach (var testString in _testStrings)
+            {
+                var wordsHelperResult = WordsHelper.HasChinese(testString);
+                var containsChineseResult = ContainsChinese(testString);
+                
+                ClassicAssert.AreEqual(wordsHelperResult, containsChineseResult,
+                    $"Results differ for string: '{testString}'. WordsHelper: {wordsHelperResult}, ContainsChinese: {containsChineseResult}");
+            }
+            
+            Console.WriteLine($"✓ Both methods produce identical results for all {_testStrings.Count} test cases");
+        }
+
+        [Test]
+        public void PerformanceComparison_BasicBenchmark()
+        {
+            const int iterations = 1000000;
+            
+            Console.WriteLine("=== CHINESE CHARACTER DETECTION PERFORMANCE TEST ===");
+            Console.WriteLine($"Test iterations: {iterations:N0}");
+            Console.WriteLine($"Test strings: {_testStrings.Count}");
+            Console.WriteLine($"Total operations: {iterations * _testStrings.Count:N0}");
+            Console.WriteLine();
+
+            // Warmup to ensure JIT compilation
+            Console.WriteLine("Warming up...");
+            for (int i = 0; i < 1000; i++)
+            {
+                foreach (var testString in _testStrings)
+                {
+                    _ = ContainsChinese(testString);
+                    _ = WordsHelper.HasChinese(testString);
+                }
+            }
+
+            // Benchmark ContainsChinese method
+            GC.Collect();
+            GC.WaitForPendingFinalizers();
+            GC.Collect();
+
+            var sw1 = System.Diagnostics.Stopwatch.StartNew();
+            for (int i = 0; i < iterations; i++)
+            {
+                foreach (var testString in _testStrings)
+                {
+                    _ = ContainsChinese(testString);
+                }
+            }
+            sw1.Stop();
+
+            // Benchmark WordsHelper.HasChinese method
+            GC.Collect();
+            GC.WaitForPendingFinalizers();
+            GC.Collect();
+
+            var sw2 = System.Diagnostics.Stopwatch.StartNew();
+            for (int i = 0; i < iterations; i++)
+            {
+                foreach (var testString in _testStrings)
+                {
+                    _ = WordsHelper.HasChinese(testString);
+                }
+            }
+            sw2.Stop();
+
+            // Calculate and display results
+            var containsChineseMs = sw1.Elapsed.TotalMilliseconds;
+            var wordsHelperMs = sw2.Elapsed.TotalMilliseconds;
+            var speedRatio = wordsHelperMs / containsChineseMs;
+            var timeDifference = wordsHelperMs - containsChineseMs;
+
+            Console.WriteLine("RESULTS:");
+            Console.WriteLine($"ContainsChinese():        {containsChineseMs:F3} ms");
+            Console.WriteLine($"WordsHelper.HasChinese(): {wordsHelperMs:F3} ms");
+            Console.WriteLine($"Time difference:          {timeDifference:F3} ms");
+            Console.WriteLine($"Speed improvement:        {speedRatio:F2}x");
+            Console.WriteLine($"Performance gain:         {((speedRatio - 1) * 100):F1}%");
+            Console.WriteLine();
+
+            if (speedRatio > 1.0)
+            {
+                Console.WriteLine($"✓ ContainsChinese() is {speedRatio:F2}x faster than WordsHelper.HasChinese()");
+            }
+            else
+            {
+                Console.WriteLine($"⚠ WordsHelper.HasChinese() is {(1/speedRatio):F2}x faster than ContainsChinese()");
+            }
+
+            // Test always passes - this is a measurement test
+            ClassicAssert.IsTrue(true);
+        }
+
+        [Test]
+        public void PerformanceComparison_ByStringType()
+        {
+            Console.WriteLine("=== PERFORMANCE BY STRING TYPE ===");
+            
+            var categories = new Dictionary<string, List<string>>
+            {
+                ["Pure English"] = _testStrings.Where(s => !ContainsChinese(s) && s.All(c => c <= 127)).ToList(),
+                ["Pure Chinese"] = _testStrings.Where(s => ContainsChinese(s) && s.All(c => IsChineseCharacter(c) || char.IsWhiteSpace(c))).ToList(),
+                ["Mixed Content"] = _testStrings.Where(s => ContainsChinese(s) && s.Any(c => c <= 127 && char.IsLetter(c))).ToList(),
+                ["Edge Cases"] = _testStrings.Where(s => string.IsNullOrWhiteSpace(s) || s.All(c => !char.IsLetter(c))).ToList()
+            };
+
+            foreach (var category in categories)
+            {
+                if (category.Value.Count == 0) continue;
+                
+                Console.WriteLine($"\n{category.Key} ({category.Value.Count} strings):");
+                
+                var sample = category.Value.First();
+                var displayText = sample.Length > 40 ? sample.Substring(0, 40) + "..." : sample;
+                Console.WriteLine($"  Sample: '{displayText}'");
+                
+                const int categoryIterations = 5000;
+                
+                // Test each method
+                var sw1 = System.Diagnostics.Stopwatch.StartNew();
+                for (int i = 0; i < categoryIterations; i++)
+                {
+                    foreach (var str in category.Value)
+                    {
+                        _ = ContainsChinese(str);
+                    }
+                }
+                sw1.Stop();
+                
+                var sw2 = System.Diagnostics.Stopwatch.StartNew();
+                for (int i = 0; i < categoryIterations; i++)
+                {
+                    foreach (var str in category.Value)
+                    {
+                        _ = WordsHelper.HasChinese(str);
+                    }
+                }
+                sw2.Stop();
+                
+                var ratio = (double)sw2.ElapsedTicks / sw1.ElapsedTicks;
+                Console.WriteLine($"  Performance: ContainsChinese is {ratio:F2}x faster");
+            }
+            
+            ClassicAssert.IsTrue(true);
+        }
+
+        /// <summary>
+        /// Optimized Chinese character detection using comprehensive CJK Unicode ranges
+        /// This method uses ReadOnlySpan for better performance and covers all CJK character ranges
+        /// </summary>
+        private static bool ContainsChinese(ReadOnlySpan<char> text)
+        {
+            foreach (var c in text)
+            {
+                if (IsChineseCharacter(c))
+                    return true;
+            }
+            return false;
+        }
+
+        /// <summary>
+        /// Check if a character is a Chinese character using comprehensive Unicode ranges
+        /// Covers CJK Unified Ideographs and all extension blocks
+        /// </summary>
+        private static bool IsChineseCharacter(char c)
+        {
+            return (c >= 0x4E00 && c <= 0x9FFF) ||     // CJK Unified Ideographs (most common Chinese characters)
+                   (c >= 0x3400 && c <= 0x4DBF) ||     // CJK Extension A
+                   (c >= 0x20000 && c <= 0x2A6DF) ||   // CJK Extension B
+                   (c >= 0x2A700 && c <= 0x2B73F) ||   // CJK Extension C
+                   (c >= 0x2B740 && c <= 0x2B81F) ||   // CJK Extension D
+                   (c >= 0x2B820 && c <= 0x2CEAF) ||   // CJK Extension E
+                   (c >= 0x2CEB0 && c <= 0x2EBEF) ||   // CJK Extension F
+                   (c >= 0xF900 && c <= 0xFAFF) ||     // CJK Compatibility Ideographs
+                   (c >= 0x2F800 && c <= 0x2FA1F);     // CJK Compatibility Supplement
+        }
+    }
+}