China's Sina Corp will launch an English version of its microblog, Weibo, by the end of the year for overseas users, a company spokesman said on Tuesday.

Sina's Chinese-language Weibo product was launched about two years ago and claims more than 140 million users.

Sina's spokesman Liu Qi said an English microblog was in the works but its release was not catered to a particular market.

"We won't be launching it in one particular market, the idea is to have the English version to cater to our many overseas users," Liu told Reuters, adding that more than 10 percent of Weibo's users are based overseas.

The English version will be launched by the end of the year and will be subject to Chinese regulations, Liu said.