That, and the fact that this site is mostly used by Americans, therefore you will naturally see more correctly AND incorrectly spelled content from them. I can’t say much about the ratio between them, but the sheer numbers affect the ratio between US and non-US users (yes, even including other native English speakers worldwide, like UK/AU).
But while it’s anecdotal, people I know are just as bad/good at spelling in a foreign language as they are in their own, regardless of the way they learned either of those.
That, and the fact that this site is mostly used by Americans, therefore you will naturally see more correctly AND incorrectly spelled content from them. I can’t say much about the ratio between them, but the sheer numbers affect the ratio between US and non-US users (yes, even including other native English speakers worldwide, like UK/AU).
But while it’s anecdotal, people I know are just as bad/good at spelling in a foreign language as they are in their own, regardless of the way they learned either of those.