diff --git a/src/Commands/GenericmessageCommand.php b/src/Commands/GenericmessageCommand.php
index 78b1a0c..e08a4e8 100644
--- a/src/Commands/GenericmessageCommand.php
+++ b/src/Commands/GenericmessageCommand.php
@@ -65,7 +65,7 @@ class GenericmessageCommand extends SystemCommand
         }
 
         $text_chara_count = count(preg_split('//u', $text, -1, PREG_SPLIT_NO_EMPTY));
-        $text_english_count = count(preg_split('~[^a-z]*~i', $text, 0, PREG_SPLIT_NO_EMPTY));
+        $text_english_count = count(preg_split('~[^a-z 0-9\'\",.]*~i', $text, 0, PREG_SPLIT_NO_EMPTY));
         if ($text_english_count >= ($text_chara_count*2 /3)) {
             $sourceLang = 'en';
             $targetLang = 'zh';