diff --git a/src/Command/DetectMissedTranslationsCommand.php b/src/Command/DetectMissedTranslationsCommand.php
new file mode 100644
index 0000000..2f5fa57
--- /dev/null
+++ b/src/Command/DetectMissedTranslationsCommand.php
@@ -0,0 +1,259 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Aeliot\Bundle\TransMaintain\Command;
+
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+use Symfony\Component\HttpKernel\KernelInterface;
+use Symfony\Component\Translation\Catalogue\MergeOperation;
+use Symfony\Component\Translation\DataCollectorTranslator;
+use Symfony\Component\Translation\Extractor\ExtractorInterface;
+use Symfony\Component\Translation\LoggingTranslator;
+use Symfony\Component\Translation\MessageCatalogue;
+use Symfony\Component\Translation\Reader\TranslationReaderInterface;
+use Symfony\Component\Translation\Translator;
+use Symfony\Contracts\Translation\TranslatorInterface;
+
+final class DetectMissedTranslationsCommand extends Command
+{
+    private const MESSAGE_MISSING = 0;
+    private const MESSAGE_UNUSED = 1;
+    private const MESSAGE_EQUALS_FALLBACK = 2;
+
+    private ?string $defaultTransPath;
+    private ?string $defaultViewsPath;
+    private ExtractorInterface $extractor;
+    private TranslationReaderInterface $reader;
+    private TranslatorInterface $translator;
+    private array $transPaths;
+    private array $viewsPaths;
+
+    public function __construct(
+        TranslatorInterface $translator,
+        TranslationReaderInterface $reader,
+        ExtractorInterface $extractor,
+        string $defaultTransPath = null,
+        string $defaultViewsPath = null,
+        array $transPaths = []
+        //, DirectoryProvider $directoryProvider = null
+    ) {
+        parent::__construct('aeliot_trans_maintain:missed:detect');
+
+        $this->extractor = $extractor;
+        $this->translator = $translator;
+        $this->reader = $reader;
+        $this->defaultTransPath = $defaultTransPath;
+        $this->defaultViewsPath = $defaultViewsPath;
+        $this->transPaths = $transPaths;
+    }
+
+    protected function configure(): void
+    {
+        $this->setDescription('Command extracts used translations and detect missed');
+        $this->addArgument('locale', InputArgument::REQUIRED, 'The locale');
+        $this->addArgument('bundle', InputArgument::OPTIONAL, 'The bundle name or directory where to load the messages');
+        $this->addOption('domain', null, InputOption::VALUE_OPTIONAL, 'The messages domain');
+        $this->addOption('view', null, InputOption::VALUE_REQUIRED | InputOption::VALUE_IS_ARRAY, 'View paths', []);
+        $this->addOption('only-missing', null, InputOption::VALUE_NONE, 'Displays only missing messages');
+        $this->addOption('only-unused', null, InputOption::VALUE_NONE, 'Displays only unused messages');
+        $this->addOption('all', null, InputOption::VALUE_NONE, 'Load messages from all registered bundles');
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output): int
+    {
+        $io = new SymfonyStyle($input, $output);
+
+        $locale = $input->getArgument('locale');
+        $domain = $input->getOption('domain');
+        $viewsPaths = $this->getViewPaths($input);
+        $transPaths = $this->getTransPaths();
+
+        // Load defined messages
+        $currentCatalogue = $this->loadCurrentMessages($locale, $transPaths);
+
+        // Extract used messages
+        $extractedCatalogue = $this->extractMessages($locale, $viewsPaths);
+
+        // Merge defined and extracted messages to get all message ids
+        $allMessages = $this->getAllMessages($extractedCatalogue, $currentCatalogue, $domain);
+
+        // No defined or extracted messages
+        if (empty($allMessages) || (null !== $domain && empty($allMessages[$domain]))) {
+            $io->getErrorStyle()->warning($this->createNoMessagesNotification($locale, $domain));
+
+            return 0;
+        }
+
+        // Display header line
+        $headers = ['State', 'Domain', 'Id', sprintf('Message Preview (%s)', $locale)];
+        $rows = $this->getTableRows($allMessages, $extractedCatalogue, $currentCatalogue);
+
+        $io->table($headers, $rows);
+
+        return 0;
+    }
+
+    private function formatId(string $id): string
+    {
+        return sprintf('<fg=cyan;options=bold>%s</>', $id);
+    }
+
+    private function sanitizeString(string $string, int $length = 40): string
+    {
+        $string = trim(preg_replace('/\s+/', ' ', $string));
+
+        if (false !== $encoding = mb_detect_encoding($string, null, true)) {
+            if (mb_strlen($string, $encoding) > $length) {
+                return mb_substr($string, 0, $length - 3, $encoding).'...';
+            }
+        } elseif (\strlen($string) > $length) {
+            return substr($string, 0, $length - 3).'...';
+        }
+
+        return $string;
+    }
+
+    private function extractMessages(string $locale, array $transPaths): MessageCatalogue
+    {
+        $extractedCatalogue = new MessageCatalogue($locale);
+        foreach ($transPaths as $path) {
+            if (is_dir($path) || is_file($path)) {
+                $this->extractor->extract($path, $extractedCatalogue);
+            }
+        }
+
+        return $extractedCatalogue;
+    }
+
+    private function loadCurrentMessages(string $locale, array $transPaths): MessageCatalogue
+    {
+        $currentCatalogue = new MessageCatalogue($locale);
+        foreach ($transPaths as $path) {
+            if (is_dir($path)) {
+                $this->reader->read($path, $currentCatalogue);
+            }
+        }
+
+        return $currentCatalogue;
+    }
+
+    /**
+     * @return MessageCatalogue[]
+     */
+    private function loadFallbackCatalogues(string $locale, array $transPaths): array
+    {
+        $fallbackCatalogues = [];
+        if ($this->translator instanceof Translator || $this->translator instanceof DataCollectorTranslator || $this->translator instanceof LoggingTranslator) {
+            foreach ($this->translator->getFallbackLocales() as $fallbackLocale) {
+                if ($fallbackLocale === $locale) {
+                    continue;
+                }
+
+                $fallbackCatalogue = new MessageCatalogue($fallbackLocale);
+                foreach ($transPaths as $path) {
+                    if (is_dir($path)) {
+                        $this->reader->read($path, $fallbackCatalogue);
+                    }
+                }
+                $fallbackCatalogues[] = $fallbackCatalogue;
+            }
+        }
+
+        return $fallbackCatalogues;
+    }
+
+    private function createNoMessagesNotification($locale, $domain): string
+    {
+        $outputMessage = sprintf('No defined or extracted messages for locale "%s"', $locale);
+
+        if (null !== $domain) {
+            $outputMessage .= sprintf(' and domain "%s"', $domain);
+        }
+
+        return $outputMessage;
+    }
+
+    private function getViewPaths(InputInterface $input): array
+    {
+        $viewsPaths = (array) ($input->getOption('view') ?: []);
+        if (!$viewsPaths && $this->defaultViewsPath) {
+            $viewsPaths[] = $this->defaultViewsPath;
+        }
+
+        return $viewsPaths;
+    }
+
+    private function getTransPaths(): array
+    {
+        /** @var KernelInterface $kernel */
+        $kernel = $this->getApplication()->getKernel();
+
+        // Define Root Paths
+        $transPaths = $this->transPaths;
+        if ($this->defaultTransPath) {
+            $transPaths[] = $this->defaultTransPath;
+        }
+
+        // Override with provided Bundle info
+        foreach ($kernel->getBundles() as $bundle) {
+            $bundleDir = $bundle->getPath();
+
+            $transPaths[] = is_dir($bundleDir.'/Resources/translations')
+                ? $bundleDir.'/Resources/translations'
+                : $bundleDir.'/translations';
+        }
+
+        return $transPaths;
+    }
+
+    /**
+     * @return array<string,mixed>
+     */
+    private function getAllMessages(
+        MessageCatalogue $extractedCatalogue,
+        MessageCatalogue $currentCatalogue,
+        ?string $domain
+    ): array {
+        $mergeOperation = new MergeOperation($extractedCatalogue, $currentCatalogue);
+        $allMessages = $mergeOperation->getResult()->all($domain);
+        if (null !== $domain) {
+            $allMessages = [$domain => $allMessages];
+        }
+
+        return $allMessages;
+    }
+
+    /**
+     * @param array<string,string> $allMessages
+     *
+     * @return string[]
+     */
+    private function getTableRows(
+        array $allMessages,
+        MessageCatalogue $extractedCatalogue,
+        MessageCatalogue $currentCatalogue
+    ): array {
+        $rows = [];
+        // Iterate all message ids and determine their state
+        foreach ($allMessages as $domain => $messages) {
+            foreach (array_keys($messages) as $messageId) {
+                if (!$extractedCatalogue->defines($messageId, $domain)
+                    || $currentCatalogue->defines($messageId, $domain)
+                ) {
+                    continue;
+                }
+
+                $value = $currentCatalogue->get($messageId, $domain);
+                $rows[] = [$domain, $this->formatId($messageId), $this->sanitizeString($value)];
+            }
+        }
+
+        return $rows;
+    }
+}