diff --git a/Command/ExtractTranslationCommand.php b/Command/ExtractTranslationCommand.php
index d099e79a..f5fc547b 100644
--- a/Command/ExtractTranslationCommand.php
+++ b/Command/ExtractTranslationCommand.php
@@ -55,15 +55,15 @@ protected function configure()
             ->addOption('output-format', null, InputOption::VALUE_REQUIRED, 'The output format that should be used (in most cases, it is better to change only the default-output-format).')
             ->addOption('default-output-format', null, InputOption::VALUE_REQUIRED, 'The default output format (defaults to xliff).')
             ->addOption('keep', null, InputOption::VALUE_NONE, 'Define if the updater service should keep the old translation (defaults to false).')
-            ->addOption('external-translations-dir', null, InputOption::VALUE_IS_ARRAY | InputOption::VALUE_REQUIRED , 'Load external translation ressources')
-        ;
+            ->addOption('keeptm', null, InputOption::VALUE_NONE, 'Define if the updater service should keep the old translation messages (defaults to false).')
+            ->addOption('external-translations-dir', null, InputOption::VALUE_IS_ARRAY | InputOption::VALUE_REQUIRED, 'Load external translation ressources');
     }
 
     protected function execute(InputInterface $input, OutputInterface $output)
     {
         $builder = $input->getOption('config') ?
-                       $this->getContainer()->get('jms_translation.config_factory')->getBuilder($input->getOption('config'))
-                       : new ConfigBuilder();
+            $this->getContainer()->get('jms_translation.config_factory')->getBuilder($input->getOption('config'))
+            : new ConfigBuilder();
 
         $this->updateWithInput($input, $builder);
 
@@ -81,11 +81,12 @@ protected function execute(InputInterface $input, OutputInterface $output)
 
             $output->writeln(sprintf('Extracting Translations for locale <info>%s</info>', $locale));
             $output->writeln(sprintf('Keep old translations: <info>%s</info>', $config->isKeepOldMessages() ? 'Yes' : 'No'));
+            $output->writeln(sprintf('Keep old translations messages: <info>%s</info>', $config->isKeepOldTranslationsMessages() ? 'Yes' : 'No'));
             $output->writeln(sprintf('Output-Path: <info>%s</info>', $config->getTranslationsDir()));
             $output->writeln(sprintf('Directories: <info>%s</info>', implode(', ', $config->getScanDirs())));
             $output->writeln(sprintf('Excluded Directories: <info>%s</info>', $config->getExcludedDirs() ? implode(', ', $config->getExcludedDirs()) : '# none #'));
             $output->writeln(sprintf('Excluded Names: <info>%s</info>', $config->getExcludedNames() ? implode(', ', $config->getExcludedNames()) : '# none #'));
-            $output->writeln(sprintf('Output-Format: <info>%s</info>', $config->getOutputFormat() ? $config->getOutputFormat() : '# whatever is present, if nothing then '.$config->getDefaultOutputFormat().' #'));
+            $output->writeln(sprintf('Output-Format: <info>%s</info>', $config->getOutputFormat() ? $config->getOutputFormat() : '# whatever is present, if nothing then ' . $config->getDefaultOutputFormat() . ' #'));
             $output->writeln(sprintf('Custom Extractors: <info>%s</info>', $config->getEnabledExtractors() ? implode(', ', array_keys($config->getEnabledExtractors())) : '# none #'));
             $output->writeln('============================================================');
 
@@ -99,24 +100,36 @@ protected function execute(InputInterface $input, OutputInterface $output)
             if ($input->getOption('dry-run')) {
                 $changeSet = $updater->getChangeSet($config);
 
-                $output->writeln('Added Messages: '.count($changeSet->getAddedMessages()));
-                if($input->hasParameterOption('--verbose')){
-                    foreach($changeSet->getAddedMessages() as $message){
-                        $output->writeln($message->getId(). '-> '.$message->getDesc());
-                    }   
+                $output->writeln('Added Messages: ' . count($changeSet->getAddedMessages()));
+                if ($input->hasParameterOption('--verbose')) {
+                    foreach ($changeSet->getAddedMessages() as $message) {
+                        $output->writeln($message->getId() . '-> ' . $message->getDesc());
+                    }
                 }
 
                 if ($config->isKeepOldMessages()) {
                     $output->writeln('Deleted Messages: # none as "Keep Old Translations" is true #');
                 } else {
-                    $output->writeln('Deleted Messages: '.count($changeSet->getDeletedMessages()));
-                    if($input->hasParameterOption('--verbose')){
-                        foreach($changeSet->getDeletedMessages() as $message){
-                            $output->writeln($message->getId(). '-> '.$message->getDesc());
-                        }   
+                    $output->writeln('Deleted Messages: ' . count($changeSet->getDeletedMessages()));
+                    if ($input->hasParameterOption('--verbose')) {
+                        foreach ($changeSet->getDeletedMessages() as $message) {
+                            $output->writeln($message->getId() . '-> ' . $message->getDesc());
+                        }
                     }
                 }
 
+                if ($config->isKeepOldTranslationsMessages()) {
+                    $output->writeln('Not keeping old Translations Messages');
+                } else {
+                    //todog
+                   /* $output->writeln('Deleted Messages: ' . count($changeSet->getDeletedMessages()));
+                    if ($input->hasParameterOption('--verbose')) {
+                        foreach ($changeSet->getDeletedMessages() as $message) {
+                            $output->writeln($message->getId() . '-> ' . $message->getDesc());
+                        }
+                    }*/
+                }
+
                 return;
             }
 
@@ -134,7 +147,7 @@ private function updateWithInput(InputInterface $input, ConfigBuilder $builder)
             }
 
             $bundle = $this->getApplication()->getKernel()->getBundle($bundle);
-            $builder->setTranslationsDir($bundle->getPath().'/Resources/translations');
+            $builder->setTranslationsDir($bundle->getPath() . '/Resources/translations');
             $builder->setScanDirs(array($bundle->getPath()));
         }
 
@@ -192,6 +205,13 @@ private function updateWithInput(InputInterface $input, ConfigBuilder $builder)
             $builder->setKeepOldTranslations(false);
         }
 
+
+        if ($input->hasParameterOption('--keeptm') || $input->hasParameterOption('--keeptm=true')) {
+            $builder->setKeepOldTranslationsMessages(true);
+        } else if ($input->hasParameterOption('--keeptm=false')) {
+            $builder->setKeepOldTranslationsMessages(false);
+        }
+
         if ($loadResource = $input->getOption('external-translations-dir')) {
             $builder->setLoadResources($loadResource);
         }
diff --git a/Resources/config/services.xml b/Resources/config/services.xml
index da663552..355db336 100644
--- a/Resources/config/services.xml
+++ b/Resources/config/services.xml
@@ -38,6 +38,7 @@
             <argument type="service" id="jms_translation.extractor_manager" />
             <argument type="service" id="logger" />
             <argument type="service" id="jms_translation.file_writer" />
+            <argument type="service" id="translator.default" />
         </service>
         
         <service id="jms_translation.config_factory" class="%jms_translation.config_factory.class%" />
diff --git a/Tests/Functional/ExtractCommandTest.php b/Tests/Functional/ExtractCommandTest.php
index 04c5f1a1..7caf6fab 100644
--- a/Tests/Functional/ExtractCommandTest.php
+++ b/Tests/Functional/ExtractCommandTest.php
@@ -38,6 +38,7 @@ public function testExtract()
         $expectedOutput =
             'Extracting Translations for locale en'."\n"
            .'Keep old translations: No'."\n"
+           .'Keep old translations messages: No'."\n"
            .'Output-Path: '.$outputDir."\n"
            .'Directories: '.$inputDir."\n"
            .'Excluded Directories: Tests'."\n"
diff --git a/Translation/Config.php b/Translation/Config.php
index 61438503..b4b27fe0 100644
--- a/Translation/Config.php
+++ b/Translation/Config.php
@@ -42,10 +42,11 @@ final class Config
     private $enabledExtractors;
 
     private $keepOldMessages;
+    private $keepOldTranslationsMessages;
     private $loadResources;
 
 
-    public function __construct($translationsDir, $locale, array $ignoredDomains, array $domains, $outputFormat, $defaultOutputFormat, array $scanDirs, array $excludedDirs, array $excludedNames, array $enabledExtractors, $keepOldMessages, array $loadResources)
+    public function __construct($translationsDir, $locale, array $ignoredDomains, array $domains, $outputFormat, $defaultOutputFormat, array $scanDirs, array $excludedDirs, array $excludedNames, array $enabledExtractors, $keepOldMessages, $keepOldTranslationsMessages, array $loadResources)
     {
         if (empty($translationsDir)) {
             throw new InvalidArgumentException('The directory where translations are must be set.');
@@ -84,6 +85,7 @@ public function __construct($translationsDir, $locale, array $ignoredDomains, ar
         $this->excludedNames = $excludedNames;
         $this->enabledExtractors = $enabledExtractors;
         $this->keepOldMessages = $keepOldMessages;
+        $this->keepOldTranslationsMessages = $keepOldTranslationsMessages;
         $this->loadResources = $loadResources;
     }
 
@@ -201,6 +203,15 @@ public function isKeepOldMessages()
         return $this->keepOldMessages;
     }
 
+    /**
+     * @return Boolean
+     */
+    public function isKeepOldTranslationsMessages()
+    {
+        return $this->keepOldTranslationsMessages;
+    }
+
+
     /**
      * @return array
      */
diff --git a/Translation/ConfigBuilder.php b/Translation/ConfigBuilder.php
index 9d7b79df..c50783d9 100644
--- a/Translation/ConfigBuilder.php
+++ b/Translation/ConfigBuilder.php
@@ -31,6 +31,7 @@ final class ConfigBuilder
     private $excludedNames = array('*Test.php', '*TestCase.php');
     private $enabledExtractors = array();
     private $keepOldTranslations = false;
+    private $keepOldTranslationsMessages = false;
     private $loadResources = array();
 
     /**
@@ -188,6 +189,14 @@ public function setKeepOldTranslations($value)
         return $this;
     }
 
+
+    public function setKeepOldTranslationsMessages($value)
+    {
+        $this->keepOldTranslationsMessages = $value;
+
+        return $this;
+    }
+
     public function getConfig()
     {
         return new Config(
@@ -202,6 +211,7 @@ public function getConfig()
             $this->excludedNames,
             $this->enabledExtractors,
             $this->keepOldTranslations,
+            $this->keepOldTranslationsMessages,
             $this->loadResources
         );
     }
diff --git a/Translation/Updater.php b/Translation/Updater.php
index fd57c691..dda1404a 100644
--- a/Translation/Updater.php
+++ b/Translation/Updater.php
@@ -24,7 +24,9 @@
 use JMS\TranslationBundle\Model\Message;
 use JMS\TranslationBundle\Translation\Comparison\CatalogueComparator;
 
+use Symfony\Bundle\FrameworkBundle\Translation\Translator;
 use Symfony\Component\HttpKernel\Log\LoggerInterface;
+use Symfony\Component\Translation\DataCollectorTranslator;
 use Symfony\Component\Translation\MessageCatalogue as SymfonyMessageCatalogue;
 use Symfony\Component\Finder\Finder;
 use Symfony\Bundle\FrameworkBundle\Translation\TranslationLoader;
@@ -52,6 +54,7 @@ class Updater
     private $scannedCatalogue;
     private $logger;
     private $writer;
+    private $translator;
 
     /**
      * @param LoaderManager $loader
@@ -59,12 +62,13 @@ class Updater
      * @param \Symfony\Component\HttpKernel\Log\LoggerInterface $logger
      * @param FileWriter $writer
      */
-    public function __construct(LoaderManager $loader, ExtractorManager $extractor, LoggerInterface $logger, FileWriter $writer)
+    public function __construct(LoaderManager $loader, ExtractorManager $extractor, LoggerInterface $logger, FileWriter $writer, Translator $translator)
     {
         $this->loader = $loader;
         $this->extractor = $extractor;
         $this->logger = $logger;
         $this->writer = $writer;
+        $this->translator = $translator;
     }
 
     /**
@@ -105,8 +109,7 @@ public function updateTranslation($file, $format, $domain, $locale, $id, $trans)
         $catalogue
             ->get($id, $domain)
             ->setLocaleString($trans)
-            ->setNew(false)
-        ;
+            ->setNew(false);
 
         $this->writer->write($catalogue, $domain, $file, $format);
     }
@@ -136,8 +139,8 @@ public function process(Config $config)
             $format = $this->detectOutputFormat($name);
 
             // delete translation files of other formats
-            foreach (Finder::create()->name('/^'.$name.'\.'.$this->config->getLocale().'\.[^\.]+$/')->in($this->config->getTranslationsDir())->depth('< 1')->files() as $file) {
-                if ('.'.$format === substr($file, -1 * strlen('.'.$format))) {
+            foreach (Finder::create()->name('/^' . $name . '\.' . $this->config->getLocale() . '\.[^\.]+$/')->in($this->config->getTranslationsDir())->depth('< 1')->files() as $file) {
+                if ('.' . $format === substr($file, -1 * strlen('.' . $format))) {
                     continue;
                 }
 
@@ -148,7 +151,7 @@ public function process(Config $config)
                 }
             }
 
-            $outputFile = $this->config->getTranslationsDir().'/'.$name.'.'.$this->config->getLocale().'.'.$format;
+            $outputFile = $this->config->getTranslationsDir() . '/' . $name . '.' . $this->config->getLocale() . '.' . $format;
             $this->logger->info(sprintf('Writing translation file "%s".', $outputFile));
             $this->writer->write($this->scannedCatalogue, $name, $outputFile, $format);
         }
@@ -171,7 +174,7 @@ private function detectOutputFormat($currentDomain)
         $otherDomainFormat = $localeFormat = $otherLocaleFormat = null;
         foreach (FileUtils::findTranslationFiles($this->config->getTranslationsDir()) as $domain => $locales) {
             foreach ($locales as $locale => $fileData) {
-                list($format, ) = $fileData;
+                list($format,) = $fileData;
 
                 if ($currentDomain !== $domain) {
                     $otherDomainFormat = $format;
@@ -245,6 +248,7 @@ private function setConfig(Config $config)
             }
         }
 
+        //keep old translations
         if ($this->config->isKeepOldMessages()) {
             foreach ($this->existingCatalogue->getDomains() as $domainCatalogue) {
                 foreach ($domainCatalogue->all() as $message) {
@@ -256,5 +260,22 @@ private function setConfig(Config $config)
                 }
             }
         }
+
+        //keep old translations translated
+        if ($this->config->isKeepOldTranslationsMessages()) {
+
+            $locale = $this->scannedCatalogue->getLocale();
+            /** @var MessageCatalogue $domainCatalogue */
+            foreach ($this->scannedCatalogue->getDomains() as $domainCatalogue) {
+
+                /** @var Message $message */
+                foreach ($domainCatalogue->all() as $message) {
+
+                    $translated = $this->translator->trans($message->getId(), array(), $message->getDomain(), $locale);
+                    $message->setLocaleString($translated);
+                    $message->setNew(false);
+                }
+            }
+        }
     }
 }