Is "ain't" same as "isn't"? When can I use it?

Native speaker’s answer
Rebecca
Yes, that's correct! "Ain't" is the informal, non-standard way of saying "isn't." While not considered standard English, it is still used quite commonly colloquially. Ex: This ain't even a problem. Don't worry about it. Ex: I ain't gonna go outside, it's raining cats and dogs out there!