Code Siging Cert for private shareware developer

I just read following thread:
https://forums.comodo.com/code_signing_certificate/documentation_for_private_shareware_developer-t12484.0.html

We have similar problem and I would like to know more detail information about it. So, if I want the cert shows the company name, 123soft. The name must be registered by myself?

I’m in China, what kind of document is acceptable for you? And, do I need to translate it to English? Thanks!