To be fair, judging by previous comments, it's likely the writer is not a native english speaker. English grammar is hard, and people make mistakes.
I for one would like HN to be an inclusive international community, and that means not jumping down people's throats just because their english is not 100%. I'd like to see any of us native english speakers try to submit something to a foreign language site...
Whilst I agree with your sentiments, a 2 word comment really is useless, not matter how great their English might be... rather than a "that's amazing!" type comment, a simple upvote on the original article would suffice, kind of like discouraging "Me too!" comments on Stackoverflow, it doesn't add much to the discussion.
Although having said that, my initial thought was the OP had hit return too early and not realised...
I for one would like HN to be an inclusive international community, and that means not jumping down people's throats just because their english is not 100%. I'd like to see any of us native english speakers try to submit something to a foreign language site...