diff --git a/libraries/src/Plugin/CMSPlugin.php b/libraries/src/Plugin/CMSPlugin.php
index 4ce165278749e..cefcff161971d 100644
--- a/libraries/src/Plugin/CMSPlugin.php
+++ b/libraries/src/Plugin/CMSPlugin.php
@@ -384,4 +384,22 @@ public function setApplication(CMSApplicationInterface $application): void
             $this->setLanguage($application->getLanguage());
         }
     }
+
+    /**
+     * Returns the string for the given key from the internal language object.
+     *
+     * @param   string  $key  The key
+     *
+     * @return  string
+     *
+     * @since   __DEPLOY_VERSION__
+     */
+    protected function text(string $key): string
+    {
+        try {
+            return $this->getLanguage()->_($key);
+        } catch (\UnexpectedValueException $e) {
+            return $this->getApplication()->getLanguage()->_($key);
+        }
+    }
 }
diff --git a/plugins/installer/packageinstaller/tmpl/default.php b/plugins/installer/packageinstaller/tmpl/default.php
index 570673f76a950..627a4c795429a 100644
--- a/plugins/installer/packageinstaller/tmpl/default.php
+++ b/plugins/installer/packageinstaller/tmpl/default.php
@@ -37,7 +37,7 @@
 $maxSizeBytes = FilesystemHelper::fileUploadMaxSize(false);
 $maxSize = HTMLHelper::_('number.bytes', $maxSizeBytes);
 ?>
-<legend><?php echo Text::_('PLG_INSTALLER_PACKAGEINSTALLER_UPLOAD_INSTALL_JOOMLA_EXTENSION'); ?></legend>
+<legend><?php echo $this->text('PLG_INSTALLER_PACKAGEINSTALLER_UPLOAD_INSTALL_JOOMLA_EXTENSION'); ?></legend>
 
 <div id="uploader-wrapper">
     <div id="dragarea" data-state="pending">
@@ -57,7 +57,7 @@
                 </div>
                 <p class="lead">
                     <span class="uploading-text">
-                        <?php echo Text::_('PLG_INSTALLER_PACKAGEINSTALLER_UPLOADING'); ?>
+                        <?php echo $this->text('PLG_INSTALLER_PACKAGEINSTALLER_UPLOADING'); ?>
                     </span>
                     <span class="uploading-number">0</span><span class="uploading-symbol">%</span>
                 </p>
@@ -68,18 +68,18 @@
                 </div>
                 <p class="lead">
                     <span class="installing-text">
-                        <?php echo Text::_('PLG_INSTALLER_PACKAGEINSTALLER_INSTALLING'); ?>
+                        <?php echo $this->text('PLG_INSTALLER_PACKAGEINSTALLER_INSTALLING'); ?>
                     </span>
                 </p>
             </div>
             <div class="upload-actions">
                 <p class="lead">
-                    <?php echo Text::_('PLG_INSTALLER_PACKAGEINSTALLER_DRAG_FILE_HERE'); ?>
+                    <?php echo $this->text('PLG_INSTALLER_PACKAGEINSTALLER_DRAG_FILE_HERE'); ?>
                 </p>
                 <p>
                     <button id="select-file-button" type="button" class="btn btn-success">
                         <span class="icon-copy" aria-hidden="true"></span>
-                        <?php echo Text::_('PLG_INSTALLER_PACKAGEINSTALLER_SELECT_FILE'); ?>
+                        <?php echo $this->text('PLG_INSTALLER_PACKAGEINSTALLER_SELECT_FILE'); ?>
                     </button>
                 </p>
                 <p>
@@ -92,7 +92,7 @@
 
 <div id="legacy-uploader" class="hidden">
     <div class="control-group">
-        <label for="install_package" class="control-label"><?php echo Text::_('PLG_INSTALLER_PACKAGEINSTALLER_EXTENSION_PACKAGE_FILE'); ?></label>
+        <label for="install_package" class="control-label"><?php echo $this->text('PLG_INSTALLER_PACKAGEINSTALLER_EXTENSION_PACKAGE_FILE'); ?></label>
         <div class="controls">
             <input class="form-control-file" id="install_package" name="install_package" type="file">
             <input id="max_upload_size" name="max_upload_size" type="hidden" value="<?php echo $maxSizeBytes; ?>" />
@@ -101,7 +101,7 @@
     </div>
     <div class="form-actions">
         <button class="btn btn-primary" type="button" id="installbutton_package">
-            <?php echo Text::_('PLG_INSTALLER_PACKAGEINSTALLER_UPLOAD_AND_INSTALL'); ?>
+            <?php echo $this->text('PLG_INSTALLER_PACKAGEINSTALLER_UPLOAD_AND_INSTALL'); ?>
         </button>
     </div>