diff --git a/phpBB/language/en/install.php b/phpBB/language/en/install.php
index 39d53ece7b..b202df85be 100644
--- a/phpBB/language/en/install.php
+++ b/phpBB/language/en/install.php
@@ -90,15 +90,19 @@ $lang = array_merge($lang, array(
 // Requirements translation
 $lang = array_merge($lang, array(
 	// Filesystem requirements
-	'FILE_NOT_EXISTS'			=> 'File not exists',
-	'FILE_NOT_EXISTS_EXPLAIN'	=> 'To be able to install phpBB the %1$s file needs to exist.',
-	'FILE_NOT_WRITABLE'			=> 'File not writable',
-	'FILE_NOT_WRITABLE_EXPLAIN'	=> 'To be able to install phpBB the %1$s file needs to be writable.',
+	'FILE_NOT_EXISTS'						=> 'File does not exist',
+	'FILE_NOT_EXISTS_EXPLAIN'				=> 'To be able to install phpBB the %1$s file needs to exist.',
+	'FILE_NOT_EXISTS_EXPLAIN_OPTIONAL'		=> 'It is recommended that the %1$s file exist for a better forum user experience.',
+	'FILE_NOT_WRITABLE'						=> 'File is not writable',
+	'FILE_NOT_WRITABLE_EXPLAIN'				=> 'To be able to install phpBB the %1$s file needs to be writable.',
+	'FILE_NOT_WRITABLE_EXPLAIN_OPTIONAL'	=> 'It is recommended that the %1$s file be writable for a better forum user experience.',
 
-	'DIRECTORY_NOT_EXISTS'				=> 'Directory not exists',
-	'DIRECTORY_NOT_EXISTS_EXPLAIN'		=> 'To be able to install phpBB the %1$s directory needs to exist.',
-	'DIRECTORY_NOT_WRITABLE'			=> 'Directory not writable',
-	'DIRECTORY_NOT_WRITABLE_EXPLAIN'	=> 'To be able to install phpBB the %1$s directory needs to be writable.',
+	'DIRECTORY_NOT_EXISTS'						=> 'Directory does not exist',
+	'DIRECTORY_NOT_EXISTS_EXPLAIN'				=> 'To be able to install phpBB the %1$s directory needs to exist.',
+	'DIRECTORY_NOT_EXISTS_EXPLAIN_OPTIONAL'		=> 'It is recommended that the %1$s directory exist for a better forum user experience.',
+	'DIRECTORY_NOT_WRITABLE'					=> 'Directory is not writable',
+	'DIRECTORY_NOT_WRITABLE_EXPLAIN'			=> 'To be able to install phpBB the %1$s directory needs to be writable.',
+	'DIRECTORY_NOT_WRITABLE_EXPLAIN_OPTIONAL'	=> 'It is recommended that the %1$s directory be writable for a better forum user experience.',
 
 	// Server requirements
 	'PHP_VERSION_REQD'					=> 'PHP version',
diff --git a/phpBB/phpbb/install/module/requirements/task/check_filesystem.php b/phpBB/phpbb/install/module/requirements/task/check_filesystem.php
index 2aec3915e0..868af39433 100644
--- a/phpBB/phpbb/install/module/requirements/task/check_filesystem.php
+++ b/phpBB/phpbb/install/module/requirements/task/check_filesystem.php
@@ -177,7 +177,9 @@ class check_filesystem extends \phpbb\install\task_base
 		if (!($exists && $writable))
 		{
 			$title = ($exists) ? 'FILE_NOT_WRITABLE' : 'FILE_NOT_EXISTS';
-			$description = array($title . '_EXPLAIN', $file);
+			$lang_suffix = '_EXPLAIN';
+			$lang_suffix .= ($failable) ? '_OPTIONAL' : '';
+			$description = array($title . $lang_suffix, $file);
 
 			if ($failable)
 			{
@@ -244,7 +246,9 @@ class check_filesystem extends \phpbb\install\task_base
 		if (!($exists && $writable))
 		{
 			$title = ($exists) ? 'DIRECTORY_NOT_WRITABLE' : 'DIRECTORY_NOT_EXISTS';
-			$description = array($title . '_EXPLAIN', $dir);
+			$lang_suffix = '_EXPLAIN';
+			$lang_suffix .= ($failable) ? '_OPTIONAL' : '';
+			$description = array($title . $lang_suffix, $dir);
 
 			if ($failable)
 			{