diff --git a/resources/magento2/validation.properties b/resources/magento2/validation.properties
index 3f5f565fc..ec1b513e1 100644
--- a/resources/magento2/validation.properties
+++ b/resources/magento2/validation.properties
@@ -2,7 +2,10 @@ validator.notEmpty={0} must not be empty
 validator.package.validPath=Please specify a valid Magento 2 installation path
 validator.alphaNumericCharacters={0} must contain letters and numbers only
 validator.startWithNumberOrCapitalLetter={0} must start from a number or a capital letter
+validator.onlyNumbers={0} must contain numbers only
+validator.identifier={0} must contain letters, numbers, dashes, and underscores only
 validator.directory.isNotValid={0} is not valid
 validator.module.noSuchModule=No such module {0}
 validator.file.alreadyExists={0} already exists
 validator.file.cantBeCreated={0} can't be created
+validator.class.alreadyDeclared={0} already declared in the target module
diff --git a/src/com/magento/idea/magento2plugin/actions/generation/dialog/OverrideClassByAPreferenceDialog.java b/src/com/magento/idea/magento2plugin/actions/generation/dialog/OverrideClassByAPreferenceDialog.java
index 437879e06..f8b9b59c1 100644
--- a/src/com/magento/idea/magento2plugin/actions/generation/dialog/OverrideClassByAPreferenceDialog.java
+++ b/src/com/magento/idea/magento2plugin/actions/generation/dialog/OverrideClassByAPreferenceDialog.java
@@ -17,6 +17,7 @@
 import com.magento.idea.magento2plugin.indexes.ModuleIndex;
 import com.magento.idea.magento2plugin.magento.packages.Package;
 import com.magento.idea.magento2plugin.ui.FilteredComboBox;
+import com.magento.idea.magento2plugin.validators.ValidatorBundle;
 import org.jetbrains.annotations.NotNull;
 import javax.swing.*;
 import java.awt.event.*;
@@ -123,7 +124,9 @@ private void onOK() {
                 getPreferenceArea()
         ), project).generate(OverrideClassByAPreferenceAction.ACTION_NAME);
         if (diXml == null) {
-            JOptionPane.showMessageDialog(null, "Preference already declared in the target module!", "Error", JOptionPane.ERROR_MESSAGE);
+            String errorMessage = ValidatorBundle.message("validator.class.alreadyDeclared", "Preference");
+            JOptionPane.showMessageDialog(null, errorMessage, "Error", JOptionPane.ERROR_MESSAGE);
+
             return;
         }
 
diff --git a/src/com/magento/idea/magento2plugin/actions/generation/dialog/validator/CreateAPluginDialogValidator.java b/src/com/magento/idea/magento2plugin/actions/generation/dialog/validator/CreateAPluginDialogValidator.java
index a1bddc2c9..496bcbe23 100644
--- a/src/com/magento/idea/magento2plugin/actions/generation/dialog/validator/CreateAPluginDialogValidator.java
+++ b/src/com/magento/idea/magento2plugin/actions/generation/dialog/validator/CreateAPluginDialogValidator.java
@@ -75,7 +75,9 @@ public boolean validate(Project project)
         }
 
         if (!pluginName.matches(Regex.IDENTIFIER)) {
-            JOptionPane.showMessageDialog(null, "Plugin Name must contain letters, numbers, dashes, and underscores only.", errorTitle, JOptionPane.ERROR_MESSAGE);
+            String errorMessage = ValidatorBundle.message("validator.identifier", "Plugin Name");
+            JOptionPane.showMessageDialog(null, errorMessage, errorTitle, JOptionPane.ERROR_MESSAGE);
+
             return false;
         }
 
@@ -88,7 +90,9 @@ public boolean validate(Project project)
         }
 
         if (!sortOrder.matches(Regex.NUMERIC)) {
-            JOptionPane.showMessageDialog(null, "Sort Order must contain numbers only.", errorTitle, JOptionPane.ERROR_MESSAGE);
+            String errorMessage = ValidatorBundle.message("validator.onlyNumbers", "Sort Order");
+            JOptionPane.showMessageDialog(null, errorMessage, errorTitle, JOptionPane.ERROR_MESSAGE);
+
             return false;
         }
 
@@ -102,7 +106,9 @@ public boolean validate(Project project)
 
         List<String> allModulesList = ModuleIndex.getInstance(project).getEditableModuleNames();
         if (!allModulesList.contains(pluginModule)) {
-            JOptionPane.showMessageDialog(null, "No such module '".concat(pluginModule).concat("'."), errorTitle, JOptionPane.ERROR_MESSAGE);
+            String errorMessage = ValidatorBundle.message("validator.module.noSuchModule", pluginModule);
+            JOptionPane.showMessageDialog(null, errorMessage, errorTitle, JOptionPane.ERROR_MESSAGE);
+
             return false;
         }
 
diff --git a/src/com/magento/idea/magento2plugin/actions/generation/dialog/validator/OverrideClassByAPreferenceDialogValidator.java b/src/com/magento/idea/magento2plugin/actions/generation/dialog/validator/OverrideClassByAPreferenceDialogValidator.java
index ddeab4126..839e7d59c 100644
--- a/src/com/magento/idea/magento2plugin/actions/generation/dialog/validator/OverrideClassByAPreferenceDialogValidator.java
+++ b/src/com/magento/idea/magento2plugin/actions/generation/dialog/validator/OverrideClassByAPreferenceDialogValidator.java
@@ -36,12 +36,16 @@ public boolean validate(Project project)
         }
 
         if (!preferenceClassName.matches(Regex.ALPHANUMERIC)) {
-            JOptionPane.showMessageDialog(null, "Preference Class Name must contain letters and numbers only.", errorTitle, JOptionPane.ERROR_MESSAGE);
+            String errorMessage = ValidatorBundle.message("validator.alphaNumericCharacters", "Preference Class");
+            JOptionPane.showMessageDialog(null, errorMessage, errorTitle, JOptionPane.ERROR_MESSAGE);
+
             return false;
         }
 
         if (!Character.isUpperCase(preferenceClassName.charAt(0)) && !Character.isDigit(preferenceClassName.charAt(0))) {
-            JOptionPane.showMessageDialog(null, "Preference Class Name must start from a number or a capital letter", errorTitle, JOptionPane.ERROR_MESSAGE);
+            String errorMessage = ValidatorBundle.message("validator.startWithNumberOrCapitalLetter", "Preference Class");
+            JOptionPane.showMessageDialog(null, errorMessage, errorTitle, JOptionPane.ERROR_MESSAGE);
+
             return false;
         }