It doesn't matter whether you have an accent or not, as long as people can understand what you are saying in English.

In my opinion, English is widely used. So non-English speaking countries,lile China, use it as the second langueage.

I don't know what is the use of english in next country. But I know it's not only the english spoken by western. Also many other country spoken English: like Bahamas, Fiji, Kenya, Kiribati, Nigeria, Pakistan, Barbados, Bermuda, Gambia, Guyana, Jamaica, Saint Kitts and Nevis, Trinidad and Tobago, Puerto Rico.