1. Make sure that you save the file as UTF-8. It might be useful if you attach a copy of your language file for us to test.
2. What file are you referring to with line 773? lang_english.conf line 773 is the following:
Code:
PLIGG_Visual_IIS_Logged_In = "You are logged in. "
3. Have you tried editing from the Admin Language Editor (Admin > Language)?
To help us out please print a reply in Chinese and we will try to translate it through software. That might make the translation more accurate and easier for us to understand.