diff --git a/src/main/java/ninja/javafx/smartcsv/fx/list/ValidationErrorListCell.java b/src/main/java/ninja/javafx/smartcsv/fx/list/ValidationErrorListCell.java
index 14b5166..9865cf9 100644
--- a/src/main/java/ninja/javafx/smartcsv/fx/list/ValidationErrorListCell.java
+++ b/src/main/java/ninja/javafx/smartcsv/fx/list/ValidationErrorListCell.java
@@ -63,7 +63,7 @@ public class ValidationErrorListCell extends ListCell<ValidationError> {
 
     private void addContent(ValidationError validationError) {
         setText(null);
-        Text text = new Text(getI18nValidatioMessage(resourceBundle, validationError.getMessages()));
+        Text text = new Text(getI18nValidatioMessage(resourceBundle, validationError));
         text.setWrappingWidth(180);
         setGraphic(text);
     }
diff --git a/src/main/java/ninja/javafx/smartcsv/fx/table/EditableValidationCell.java b/src/main/java/ninja/javafx/smartcsv/fx/table/EditableValidationCell.java
index 93c0a5d..c80e861 100644
--- a/src/main/java/ninja/javafx/smartcsv/fx/table/EditableValidationCell.java
+++ b/src/main/java/ninja/javafx/smartcsv/fx/table/EditableValidationCell.java
@@ -77,7 +77,7 @@ public class EditableValidationCell extends TableCell<CSVRow, CSVValue> {
             setTooltip(null);
         } else if (item.getValidationError() != null) {
             setStyle("-fx-background-color: #ff8888");
-            setTooltip(new Tooltip(getI18nValidatioMessage(resourceBundle, item.getValidationError().getMessages())));
+            setTooltip(new Tooltip(getI18nValidatioMessage(resourceBundle, item.getValidationError())));
         }
 
         if (item == null || empty) {
diff --git a/src/main/java/ninja/javafx/smartcsv/fx/util/I18nValidationUtil.java b/src/main/java/ninja/javafx/smartcsv/fx/util/I18nValidationUtil.java
index 581a510..1fdd15d 100644
--- a/src/main/java/ninja/javafx/smartcsv/fx/util/I18nValidationUtil.java
+++ b/src/main/java/ninja/javafx/smartcsv/fx/util/I18nValidationUtil.java
@@ -26,23 +26,32 @@
 
 package ninja.javafx.smartcsv.fx.util;
 
+import ninja.javafx.smartcsv.validation.ValidationError;
 import ninja.javafx.smartcsv.validation.ValidationMessage;
 
 import java.io.StringWriter;
 import java.util.List;
 import java.util.ResourceBundle;
 
+import static java.text.MessageFormat.format;
+
 /**
  * This class makes validation messages readable in supported languages
  */
 public class I18nValidationUtil {
 
-    public static String getI18nValidatioMessage(ResourceBundle resourceBundle, List<ValidationMessage> validationMessages) {
+    public static String getI18nValidatioMessage(ResourceBundle resourceBundle, ValidationError error) {
 
+        List<ValidationMessage> validationMessages = error.getMessages();
         StringWriter message = new StringWriter();
         for (ValidationMessage validationMessage: validationMessages) {
             if (resourceBundle.containsKey(validationMessage.getKey())) {
-                message.append(resourceBundle.getString(validationMessage.getKey())).append("\n");
+                String resourceText = resourceBundle.getString(validationMessage.getKey());
+                if (validationMessage.getParameters().length > 0) {
+                    message.append(format(resourceText, validationMessage.getParameters())).append("\n");
+                } else {
+                    message.append(resourceText).append("\n");
+                }
             } else {
                 message.append(validationMessage.getKey()).append("\n");
             }
diff --git a/src/main/java/ninja/javafx/smartcsv/validation/ValidationMessage.java b/src/main/java/ninja/javafx/smartcsv/validation/ValidationMessage.java
index c57a5b2..fea0678 100644
--- a/src/main/java/ninja/javafx/smartcsv/validation/ValidationMessage.java
+++ b/src/main/java/ninja/javafx/smartcsv/validation/ValidationMessage.java
@@ -68,4 +68,12 @@ public class ValidationMessage {
         result = 31 * result + Arrays.hashCode(parameters);
         return result;
     }
+
+    @Override
+    public String toString() {
+        return "ValidationMessage{" +
+                "key='" + key + '\'' +
+                ", parameters=" + Arrays.toString(parameters) +
+                '}';
+    }
 }
diff --git a/src/main/java/ninja/javafx/smartcsv/validation/Validator.java b/src/main/java/ninja/javafx/smartcsv/validation/Validator.java
index fba5c49..94dc53b 100644
--- a/src/main/java/ninja/javafx/smartcsv/validation/Validator.java
+++ b/src/main/java/ninja/javafx/smartcsv/validation/Validator.java
@@ -128,11 +128,11 @@ public class Validator {
             try {
                 groovyResult = script.run();
             } catch (CompilationFailedException e) {
-                error.add("groovy script '"+groovyScript+"' throws exception: "+e.getMessage());
+                error.add("validation.message.groovy.exception", groovyScript, e.getMessage());
                 e.printStackTrace();
             }
             if (groovyResult == null) {
-                error.add("groovy script '"+groovyScript+"' returns null");
+                error.add("validation.message.groovy.return.null", groovyScript);
             }
 
             if (!isScriptResultTrue(groovyResult)) {
@@ -166,7 +166,7 @@ public class Validator {
         Integer minLength = getInteger(columnConfig, "minlength");
         if (minLength != null) {
             if (!minLength(value, minLength)) {
-                error.add("has not min length of " + minLength);
+                error.add("validation.message.min.length", minLength.toString());
             }
         }
     }
@@ -175,7 +175,7 @@ public class Validator {
         Integer maxLength = getInteger(columnConfig, "maxlength");
         if (maxLength != null) {
             if (!maxLength(value, maxLength)) {
-                error.add("has not max length of " + maxLength);
+                error.add("validation.message.max.length", maxLength.toString());
             }
         }
     }
@@ -184,7 +184,7 @@ public class Validator {
         String dateformat = getString(columnConfig, "date");
         if (dateformat != null && !dateformat.trim().isEmpty()) {
             if (!isDate(value, dateformat, true)) {
-                error.add("is not a date of format " + dateformat);
+                error.add("validation.message.date.format", dateformat);
             }
         }
     }
@@ -201,7 +201,7 @@ public class Validator {
         String regexp = getString(columnConfig, "regexp");
         if (regexp != null && !regexp.trim().isEmpty()) {
             if (!matchRegexp(value, regexp)) {
-                error.add("does not match " + regexp);
+                error.add("validation.message.regexp", regexp);
             }
         }
     }
@@ -237,10 +237,9 @@ public class Validator {
                     List<String> headerConfig = headerSectionConfig.getStringList("list");
                     if (headerConfig != null) {
                         if (headerNames.length != headerConfig.size()) {
-                            result = ValidationError.withoutLineNumber().add("number of headers is not correct! there are " +
-                                    headerNames.length +
-                                    " but there should be " +
-                                    headerConfig.size());
+                            result = ValidationError.withoutLineNumber().add("validation.message.header.length",
+                                    Integer.toString(headerNames.length),
+                                    Integer.toString(headerConfig.size()));
                             return result;
                         }
 
@@ -249,13 +248,10 @@ public class Validator {
                         for(int i=0; i<headerConfig.size(); i++) {
                             String header = headerConfig.get(i);
                             if (!header.equals(headerNames[i])) {
-                                error.add("header number " +
-                                        i +
-                                        " does not match \"" +
-                                        header +
-                                        "\" should be \"" +
-                                        headerNames[i] +
-                                        "\"");
+                                error.add("validation.message.header.match",
+                                        Integer.toString(i),
+                                        header,
+                                        headerNames[i]);
                             }
                         }
                         if (!error.isEmpty()) {
diff --git a/src/main/resources/ninja/javafx/smartcsv/fx/smartcsv.properties b/src/main/resources/ninja/javafx/smartcsv/fx/smartcsv.properties
index 2ee4e0c..475cd86 100644
--- a/src/main/resources/ninja/javafx/smartcsv/fx/smartcsv.properties
+++ b/src/main/resources/ninja/javafx/smartcsv/fx/smartcsv.properties
@@ -12,4 +12,13 @@ title.validation.errors = Validation Errors:
 # validaton messages
 validation.message.not.empty = should not be empty
 validation.message.integer = should be an integer
-validation.message.alphanumeric = should be alphanumeric
\ No newline at end of file
+validation.message.alphanumeric = should be alphanumeric
+validation.message.groovy.exception = groovy script '{0}' throws exception: {1}
+validation.message.groovy.return.null = groovy script '{0}' returns null
+validation.message.min.length = has not min length of {0}
+validation.message.max.length = has not max length of {0}
+validation.message.date.format = is not a date of format {0}
+validation.message.regexp = does not match {0}
+
+validation.message.header.length = number of headers is not correct! there are {0} but there should be {1}
+validation.message.header.match = header number {0} does not match "{1}" should be "{3}"
\ No newline at end of file
diff --git a/src/main/resources/ninja/javafx/smartcsv/fx/smartcsv_de.properties b/src/main/resources/ninja/javafx/smartcsv/fx/smartcsv_de.properties
index 0da38ec..2ac332a 100644
--- a/src/main/resources/ninja/javafx/smartcsv/fx/smartcsv_de.properties
+++ b/src/main/resources/ninja/javafx/smartcsv/fx/smartcsv_de.properties
@@ -20,4 +20,13 @@ title.validation.errors = Fehler in der Datei:
 # validaton messages
 validation.message.not.empty = Darf nicht leer sein.
 validation.message.integer = Muss eine Zahl sein.
-validation.message.alphanumeric = Darf nur Zahlen und Buchstaben enthalten.
\ No newline at end of file
+validation.message.alphanumeric = Darf nur Zahlen und Buchstaben enthalten.
+validation.message.groovy.exception = groovy script '{0}' wirft folgenden Fehler: {1}
+validation.message.groovy.return.null = groovy script '{0}' meldet "null"
+validation.message.min.length = Hat nicht die minimale L\u00e4nge von {0}
+validation.message.max.length = Hat nicht die maximale L\u00e4nge von {0}
+validation.message.date.format = Das Datumsformat entspricht nicht {0}
+validation.message.regexp = entspricht nicht dem regul\u00e4ren Ausdruck {0}
+
+validation.message.header.length = Anzahl der \u00dcberschriften ist nicht korrekt! Es sind {0} aber es sollten {1} sein
+validation.message.header.match = \u00dcberschrift in Spalte {0} stimmt nicht. "{1}" sollte "{3}" sein
\ No newline at end of file
diff --git a/src/test/java/ninja/javafx/smartcsv/validation/HeaderValidationTest.java b/src/test/java/ninja/javafx/smartcsv/validation/HeaderValidationTest.java
index 7472e1a..27a125d 100644
--- a/src/test/java/ninja/javafx/smartcsv/validation/HeaderValidationTest.java
+++ b/src/test/java/ninja/javafx/smartcsv/validation/HeaderValidationTest.java
@@ -108,9 +108,9 @@ public class HeaderValidationTest {
         return asList(new Object[][] {
                 { new String[] {}, new String[] {}, true, null },
                 { new String[] {"a"}, new String[] {"a"}, true, null },
-                { new String[] {"a"}, new String[] {"b"}, false, singletonList(new ValidationMessage("header number 0 does not match \"a\" should be \"b\""))},
-                { new String[] {"a"}, new String[] {"a","b"}, false, singletonList(new ValidationMessage("number of headers is not correct! there are 2 but there should be 1"))},
-                { new String[] {"a", "b"}, new String[] {"b", "a"}, false, asList(new ValidationMessage("header number 0 does not match \"a\" should be \"b\""), new ValidationMessage("header number 1 does not match \"b\" should be \"a\"")) }
+                { new String[] {"a"}, new String[] {"b"}, false, singletonList(new ValidationMessage("validation.message.header.match", "0", "a", "b"))},
+                { new String[] {"a"}, new String[] {"a","b"}, false, singletonList(new ValidationMessage("validation.message.header.length", "2", "1"))},
+                { new String[] {"a", "b"}, new String[] {"b", "a"}, false, asList(new ValidationMessage("validation.message.header.match", "0", "a", "b"), new ValidationMessage("validation.message.header.match", "1", "b", "a")) }
         });
     }
 }
diff --git a/src/test/java/ninja/javafx/smartcsv/validation/ValidatorTest.java b/src/test/java/ninja/javafx/smartcsv/validation/ValidatorTest.java
index ac426f8..29bd918 100644
--- a/src/test/java/ninja/javafx/smartcsv/validation/ValidatorTest.java
+++ b/src/test/java/ninja/javafx/smartcsv/validation/ValidatorTest.java
@@ -90,15 +90,15 @@ public class ValidatorTest {
                 { "column", "integer", true, "column", "999", true, null },
                 { "column", "integer", true, "column", "a", false, new ValidationMessage("validation.message.integer") },
                 { "column", "minlength", 2, "column", "12", true, null },
-                { "column", "minlength", 2, "column", "1", false, new ValidationMessage("has not min length of 2") },
+                { "column", "minlength", 2, "column", "1", false, new ValidationMessage("validation.message.min.length", "2") },
                 { "column", "maxlength", 2, "column", "12", true, null },
-                { "column", "maxlength", 2, "column", "123", false, new ValidationMessage("has not max length of 2") },
+                { "column", "maxlength", 2, "column", "123", false, new ValidationMessage("validation.message.max.length", "2") },
                 { "column", "date", "yyyyMMdd", "column", "20151127", true, null },
-                { "column", "date", "yyyyMMdd", "column", "27.11.2015", false, new ValidationMessage("is not a date of format yyyyMMdd") },
+                { "column", "date", "yyyyMMdd", "column", "27.11.2015", false, new ValidationMessage("validation.message.date.format", "yyyyMMdd") },
                 { "column", "alphanumeric", true, "column", "abcABC123", true, null },
                 { "column", "alphanumeric", true, "column", "-abcABC123", false, new ValidationMessage("validation.message.alphanumeric") },
                 { "column", "regexp", "[a-z]*", "column", "abc", true, null },
-                { "column", "regexp", "[a-z]*", "column", "abcA", false, new ValidationMessage("does not match [a-z]*") },
+                { "column", "regexp", "[a-z]*", "column", "abcA", false, new ValidationMessage("validation.message.regexp", "[a-z]*") },
                 { "column", "groovy", "value.contains('a')? 'true' : 'no a inside'", "column", "abcdef", true, null },
                 { "column", "groovy", "value.contains('a')? 'true' : 'no a inside'", "column", "bcdefg", false, new ValidationMessage("no a inside") },
         });