Language & region term changes

[tphanmt]

A few weeks ago, my query for Chinese-language articles started returning English-language articles because the language and region terms have changed on Google. To search for Chinese-language articles, I needed to set the country ('CN', 'TW', or 'HK') and the language ('zh-CN', 'zh-TW', 'zh-HK'). Before, I only had to set the language ('zh-Hans' or 'zh-Hant'). Other languages should be verified too.