I know, the "right" answer is full of respect and other politically correct stuff.
But what do you really do, if you stumble upon an article, which produced by non-English person?
Do you search another source of the same information? Do you try to understand? Do you feel angry on errors? Do you try to give some advice?
Or you just do not care?
Be as open as you can in your answer, please :)
Collato