Today, Matt Cutts said not to worry about comments with bad spelling & grammar left by others on your blog post regarding the page’s ranking abilities. In a video published on YouTube, however, he said to make sure that the content is written and comments left by the owner of the blog should not have such mistakes.

We often come in situations where visitors who read our blog posts leave comments with spelling and grammar mistakes; maybe some bloggers tend to give attention to these but mostly ignore such problems. You may have seen several such comments on the Youtube video website, which do not make much sense. Matt said that these types of comments do not affect page ranking. Just make sure that these are not spammy or left by spamming bots.

You should take care to remove comments left by automatic comment bots OR the comments which are spammy; as we know, all types of user-generated spam can cause problems for pages, mainly comments. If you can go for manual blog comments from experts in that particular niche, it can be a good way of getting inbound links.

Do not assume that every visitor leaving comments will be Native English speaking; anyone seeking information can read your post and leave comments on the web. So, in reality, it’s natural to have misspellings in comments. It is on you if you want to correct grammar and not approve such comments, while these third-party comments will not negatively affect your search engine rankings. You can get a blog commenting expert’s help for this.