diff --git a/src/Form/JobItemForm.php b/src/Form/JobItemForm.php
index 976741f..aeef358 100644
--- a/src/Form/JobItemForm.php
+++ b/src/Form/JobItemForm.php
@@ -329,6 +329,7 @@ class JobItemForm extends TmgmtFormBase {
       $translator_ui->reviewFormSubmit($form, $form_state, $item);
     }
     // Write changes back to item.
+    $data_service = \Drupal::service('tmgmt.data');
     foreach ($form_state->getValues() as $key => $value) {
       if (is_array($value) && isset($value['translation'])) {
         // Update the translation, this will only update the translation in case
@@ -346,14 +347,19 @@ class JobItemForm extends TmgmtFormBase {
             '#origin' => 'local',
           );
         }
+
+        // Unmask the translation's HTML tags.
+        $data_item = $item->getData($data_service->ensureArrayKey($key));
+        if (isset($data_item['#translation']['#text'])) {
+          $text = $data_item['#translation']['#text'];
+          \Drupal::moduleHandler()->alter('tmgmt_data_item_text_input', $text, $data_item, $item);
+        }
+
         if ($data['#text'] == '' && $item->isActive() && $form_state->getTriggeringElement()['#value'] != '✓') {
           $data = NULL;
           continue;
         }
-
-        $data_service = \Drupal::service('tmgmt.data');
-        $current_data_status = $item->getData($data_service->ensureArrayKey($key))['#status'];
-
+        $current_data_status = $data_item['#status'];
         $item->addTranslatedData($data, $key, $current_data_status);
       }
     }
@@ -962,10 +968,16 @@ class JobItemForm extends TmgmtFormBase {
    *   The form element for the data item.
    */
   protected function buildTranslation($item_element, $data_item, $rows, FormStateInterface $form_state, $is_preliminary) {
+    // @todo Add context that this is translation.
+    $text = NULL;
+    if (isset($data_item['#translation']['#text'])) {
+      $text = $data_item['#translation']['#text'];
+      \Drupal::moduleHandler()->alter('tmgmt_data_item_text_output', $text, $data_item, $this->entity);
+    }
     if (!empty($data_item['#format']) && $this->config('tmgmt.settings')->get('respect_text_format') && !$form_state->has('accept_item')) {
       $item_element['translation'] = array(
         '#type' => 'text_format',
-        '#default_value' => isset($data_item['#translation']['#text']) ? $data_item['#translation']['#text'] : NULL,
+        '#default_value' => $text,
         '#title' => t('Translation'),
         '#disabled' => $this->entity->isAccepted() || $is_preliminary,
         '#rows' => $rows,
@@ -984,7 +996,7 @@ class JobItemForm extends TmgmtFormBase {
     else {
       $item_element['translation'] = array(
         '#type' => 'textarea',
-        '#default_value' => isset($data_item['#translation']['#text']) ? $data_item['#translation']['#text'] : NULL,
+        '#default_value' => $text,
         '#title' => t('Translation'),
         '#disabled' => $this->entity->isAccepted() || $is_preliminary,
         '#rows' => $rows,
@@ -1036,10 +1048,12 @@ class JobItemForm extends TmgmtFormBase {
    *   The form element for the data item.
    */
   protected function buildSource($item_element, $data_item, $rows, FormStateInterface $form_state) {
+    $text = $data_item['#text'];
+    \Drupal::moduleHandler()->alter('tmgmt_data_item_text_output', $text, $data_item, $this->entity);
     if (!empty($data_item['#format']) && $this->config('tmgmt.settings')->get('respect_text_format') && !$form_state->has('accept_item')) {
       $item_element['source'] = array(
         '#type' => 'text_format',
-        '#default_value' => $data_item['#text'],
+        '#default_value' => $text,
         '#title' => t('Source'),
         '#disabled' => TRUE,
         '#rows' => $rows,
@@ -1058,7 +1072,7 @@ class JobItemForm extends TmgmtFormBase {
     else {
       $item_element['source'] = array(
         '#type' => 'textarea',
-        '#default_value' => $data_item['#text'],
+        '#default_value' => $text,
         '#title' => t('Source'),
         '#disabled' => TRUE,
         '#rows' => $rows,
diff --git a/tmgmt_test/tmgmt_test.module b/tmgmt_test/tmgmt_test.module
index 818ebea..5c7d7e6 100644
--- a/tmgmt_test/tmgmt_test.module
+++ b/tmgmt_test/tmgmt_test.module
@@ -6,6 +6,7 @@
  */
 
 use Drupal\tmgmt\JobInterface;
+use Drupal\tmgmt\JobItemInterface;
 
 /**
  * Implements hook_tmgmt_translator_info_alter().
@@ -43,3 +44,17 @@ function tmgmt_test_tmgmt_file_text_processor_plugin_info() {
     ),
   );
 }
+
+/**
+ * Implements hook_tmgmt_data_item_text_output_alter().
+ */
+function tmgmt_test_tmgmt_data_item_text_output_alter(&$text, $data_item, JobItemInterface &$job_item) {
+  $text = str_replace('First', 'Second', $text);
+}
+
+/**
+ * Implements hook_tmgmt_data_item_text_input_alter().
+ */
+function tmgmt_test_tmgmt_data_item_text_input_alter(&$text, $data_item, JobItemInterface $job_item) {
+  $text = str_replace('Second', 'First', $text);
+}