Often, a person will leave a comment on a blog and use terrible spelling and/or grammar. I myself often write way too fast and make mistakes in this area. In this video, Matt Cutts from Google discusses grammar and spelling in blog comments and SEO. He basically says, it is not an issue. However, what he fails to mention is that runaway comment spam, or a long list of spammy comments with links in them, can result in a penalty. While this is the case, as far as small spelling and grammar errors, they should not be an issue for SEO.
Grammar and Spelling in Blog Comments for SEO
By John Lincoln
About John Lincoln
John Lincoln is CEO of Ignite Visibility, a top digital marketing agency and a six-time Inc. 5000 company. Lincoln is a frequent speaker, author of Digital Influencer, The Forecaster Method, Advolution, and creator of SEO: The Movie and Social Media Marketing: The Movie. He is consistently named one of the top digital marketers in the industry and has received the Search Engine Land "Search Marketer of the Year" award. Lincoln has taught digital marketing and web analytics at the University of California, San Diego since 2010 and has been named as one of San Diego's most admired CEOs and a top business leader under forty.