Federico, Hi, sorry for this late reply. Thanks for your patient answer, I really appreciate it. 1. I am using the default search function, which located on the top right 2. I have not installed any search related extensions 3. The key word searched is in Chinese, and I am sure this key word is contained in some articles (in titles, content, etc.) 4. Mysql is used for database Thanks for the example your provide, which give me confidence to fix this problem. Does Mediawiki support this search way natively or with the powerful extension you mentioned, CirrusSearch? I am trying to install the extension you suggest, CirrusSearch, and will feedback later. At the end of your email, "Translate" is mentioned, do you mean "translate" extension, <https://www.mediawiki.org/wiki/Extension:Translate>? Thanks again, for your very friendly and patient email. Best regards, Grammy Jiang Qingdao Create Future Environment Protection Technology Consultancy Co., Ltd Room 6-11, Building B, International Innovation Park, Songling Road, Laoshan District, Qingdao City, China On Sun, Sep 21, 2014 at 5:23 AM, Federico Leva (Nemo) &lt;nemowiki(a)gmail.com&gt; wrote: