diff --git a/src/modules/launcher/Plugins/Microsoft.Plugin.Program/ProgramSuffixes.xaml.cs b/src/modules/launcher/Plugins/Microsoft.Plugin.Program/ProgramSuffixes.xaml.cs
index 2fc8ed98e5..3e6bbb47c2 100644
--- a/src/modules/launcher/Plugins/Microsoft.Plugin.Program/ProgramSuffixes.xaml.cs
+++ b/src/modules/launcher/Plugins/Microsoft.Plugin.Program/ProgramSuffixes.xaml.cs
@@ -16,7 +16,7 @@ namespace Microsoft.Plugin.Program
             this.context = context;
             InitializeComponent();
             _settings = settings;
-            tbSuffixes.Text = string.Join(Settings.SuffixSeperator.ToString(), _settings.ProgramSuffixes);
+            tbSuffixes.Text = string.Join(Settings.SuffixSeparator.ToString(), _settings.ProgramSuffixes);
         }
 
         private void ButtonBase_OnClick(object sender, RoutedEventArgs e)
@@ -28,7 +28,7 @@ namespace Microsoft.Plugin.Program
                 return;
             }
 
-            _settings.ProgramSuffixes = tbSuffixes.Text.Split(Settings.SuffixSeperator);
+            _settings.ProgramSuffixes = tbSuffixes.Text.Split(Settings.SuffixSeparator);
             string msg = context.API.GetTranslation("wox_plugin_program_update_file_suffixes");
             MessageBox.Show(msg);
 
diff --git a/src/modules/launcher/Plugins/Microsoft.Plugin.Program/Settings.cs b/src/modules/launcher/Plugins/Microsoft.Plugin.Program/Settings.cs
index e598bd4f7f..8fbe4ba489 100644
--- a/src/modules/launcher/Plugins/Microsoft.Plugin.Program/Settings.cs
+++ b/src/modules/launcher/Plugins/Microsoft.Plugin.Program/Settings.cs
@@ -15,7 +15,7 @@ namespace Microsoft.Plugin.Program
 
         public bool EnableRegistrySource { get; set; } = true;
 
-        internal const char SuffixSeperator = ';';
+        internal const char SuffixSeparator = ';';
 
         /// <summary>
         /// Contains user added folder location contents as well as all user disabled applications
diff --git a/src/modules/launcher/Plugins/Microsoft.Plugin.Shell/Main.cs b/src/modules/launcher/Plugins/Microsoft.Plugin.Shell/Main.cs
index 22a65d349a..1d96964fee 100644
--- a/src/modules/launcher/Plugins/Microsoft.Plugin.Shell/Main.cs
+++ b/src/modules/launcher/Plugins/Microsoft.Plugin.Shell/Main.cs
@@ -317,7 +317,7 @@ namespace Microsoft.Plugin.Shell
 
         private void OnWinRPressed()
         {
-            _context.API.ChangeQuery($"{_context.CurrentPluginMetadata.ActionKeywords[0]}{Wox.Plugin.Query.TermSeperater}");
+            _context.API.ChangeQuery($"{_context.CurrentPluginMetadata.ActionKeywords[0]}{Wox.Plugin.Query.TermSeparator}");
             Application.Current.MainWindow.Visibility = Visibility.Visible;
         }
 
diff --git a/src/modules/launcher/PowerLauncher/ActionKeywords.xaml.cs b/src/modules/launcher/PowerLauncher/ActionKeywords.xaml.cs
index 68024b1270..40ae4967a6 100644
--- a/src/modules/launcher/PowerLauncher/ActionKeywords.xaml.cs
+++ b/src/modules/launcher/PowerLauncher/ActionKeywords.xaml.cs
@@ -27,7 +27,7 @@ namespace Wox
 
         private void ActionKeyword_OnLoaded(object sender, RoutedEventArgs e)
         {
-            tbOldActionKeyword.Text = string.Join(Query.ActionKeywordSeperater, _plugin.Metadata.ActionKeywords.ToArray());
+            tbOldActionKeyword.Text = string.Join(Query.ActionKeywordSeparator, _plugin.Metadata.ActionKeywords.ToArray());
             tbAction.Focus();
         }
 
diff --git a/src/modules/launcher/Wox.Core/Plugin/QueryBuilder.cs b/src/modules/launcher/Wox.Core/Plugin/QueryBuilder.cs
index b01a93291c..ba1142a8cd 100644
--- a/src/modules/launcher/Wox.Core/Plugin/QueryBuilder.cs
+++ b/src/modules/launcher/Wox.Core/Plugin/QueryBuilder.cs
@@ -10,13 +10,13 @@ namespace Wox.Core.Plugin
         public static Query Build(string text, Dictionary<string, PluginPair> nonGlobalPlugins)
         {
             // replace multiple white spaces with one white space
-            var terms = text.Split(new[] { Query.TermSeperater }, StringSplitOptions.RemoveEmptyEntries);
+            var terms = text.Split(new[] { Query.TermSeparator }, StringSplitOptions.RemoveEmptyEntries);
             if (terms.Length == 0)
             { // nothing was typed
                 return null;
             }
 
-            var rawQuery = string.Join(Query.TermSeperater, terms);
+            var rawQuery = string.Join(Query.TermSeparator, terms);
             string actionKeyword, search;
             string possibleActionKeyword = terms[0];
             List<string> actionParameters;
diff --git a/src/modules/launcher/Wox.Plugin/Query.cs b/src/modules/launcher/Wox.Plugin/Query.cs
index 46ea32bfda..f2a0e06dcd 100644
--- a/src/modules/launcher/Wox.Plugin/Query.cs
+++ b/src/modules/launcher/Wox.Plugin/Query.cs
@@ -41,11 +41,11 @@ namespace Wox.Plugin
         /// <summary>
         /// Query can be splited into multiple terms by whitespace
         /// </summary>
-        public const string TermSeperater = " ";
+        public const string TermSeparator = " ";
         /// <summary>
         /// User can set multiple action keywords separated by ';'
         /// </summary>
-        public const string ActionKeywordSeperater = ";";
+        public const string ActionKeywordSeparator = ";";
 
         /// <summary>
         /// '*' is used for System Plugin
@@ -67,7 +67,7 @@ namespace Wox.Plugin
             get
             {
                 var index = string.IsNullOrEmpty(ActionKeyword) ? 1 : 2;
-                return string.Join(TermSeperater, Terms.Skip(index).ToArray());
+                return string.Join(TermSeparator, Terms.Skip(index).ToArray());
             }
         }
 
diff --git a/src/modules/launcher/Wox/ActionKeywords.xaml.cs b/src/modules/launcher/Wox/ActionKeywords.xaml.cs
index 68024b1270..40ae4967a6 100644
--- a/src/modules/launcher/Wox/ActionKeywords.xaml.cs
+++ b/src/modules/launcher/Wox/ActionKeywords.xaml.cs
@@ -27,7 +27,7 @@ namespace Wox
 
         private void ActionKeyword_OnLoaded(object sender, RoutedEventArgs e)
         {
-            tbOldActionKeyword.Text = string.Join(Query.ActionKeywordSeperater, _plugin.Metadata.ActionKeywords.ToArray());
+            tbOldActionKeyword.Text = string.Join(Query.ActionKeywordSeparator, _plugin.Metadata.ActionKeywords.ToArray());
             tbAction.Focus();
         }
 
diff --git a/src/modules/launcher/Wox/ViewModel/PluginViewModel.cs b/src/modules/launcher/Wox/ViewModel/PluginViewModel.cs
index 0a5239a8a0..97b0514bfb 100644
--- a/src/modules/launcher/Wox/ViewModel/PluginViewModel.cs
+++ b/src/modules/launcher/Wox/ViewModel/PluginViewModel.cs
@@ -16,6 +16,6 @@ namespace Wox.ViewModel
         public Visibility ActionKeywordsVisibility => PluginPair.Metadata.ActionKeywords.Count > 1 ? Visibility.Collapsed : Visibility.Visible;
         public string InitilizaTime => string.Format(_translator.GetTranslation("plugin_init_time"), PluginPair.Metadata.InitTime);
         public string QueryTime => string.Format(_translator.GetTranslation("plugin_query_time"), PluginPair.Metadata.AvgQueryTime);
-        public string ActionKeywordsText => string.Join(Query.ActionKeywordSeperater, PluginPair.Metadata.ActionKeywords);
+        public string ActionKeywordsText => string.Join(Query.ActionKeywordSeparator, PluginPair.Metadata.ActionKeywords);
     }
 }
diff --git a/src/runner/system_menu_helper.cpp b/src/runner/system_menu_helper.cpp
index 9df5a37d83..18026c014d 100644
--- a/src/runner/system_menu_helper.cpp
+++ b/src/runner/system_menu_helper.cpp
@@ -132,7 +132,7 @@ bool SystemMenuHelper::AddSeparator(PowertoyModuleIface* module, HWND window)
 
         if (InsertMenuItem(systemMenu, GetMenuItemCount(systemMenu) - KSeparatorPos, true, &separator))
         {
-            IdMappings[separator.wID] = { module, L"sepparator_dummy_name" };
+            IdMappings[separator.wID] = { module, L"separator_dummy_name" };
             return true;
         }
     }