I put this into the article on zh.wp. And I found that it outputs a incomplete code-block of Language Converter.
Like :w:zh:新浪微博, It outputed this.
http://www.weibo.com">http://www.weibo.com;zh-hans:http://www.weibo.com;zh-hant:http://www.weibo.com;zh-cn:http://www.weibo.com;zh-hk:http://www.weibo.com;zh-mo:http://www.weibo.com;zh-sg:http://www.weibo.com;zh-tw:http://www.weibo.com;}-
But I used Special:ExpandTemplates to parse it, it's output is clean. just 'http://www.weibo.com'.
Tech/News/2016/41 has a news that 'Language converter syntax will soon no longer work inside external links.' , Is it about this problem? And I'm not very sure whether it have a Mediawiki message page to set the format of the property's output, or a hard code to format it when the site enable Language Converter