Spelling and Grammar
The effects of spelling and grammar on Google rank is unknown but in my view is fairly minor.
Maybe keep this point in mind: If the use of spelling variation or spelling errors on your website cause a user to lose trust, then you should expect it to affect your Google rank at some point too.
Likewise with grammar, aside from regional variations like between US and NZ English, any errors that reduce the user’s faith in your ability to deliver is likely to end up affecting your rank at some point. Always run your text through a spell checker that matches with your variation of English.
Some examples of regional variation:
- color vs colour
- organization vs organisation
- neighborhood vs neighborhood
- ‘you did good’ vs ‘you did well’
My advice around language variation is to use the variation that best applies to your target market. If your target is New Zealand, use ‘colour’, not ‘color’.
Don’t add the other variations for any supposed ‘seo purposes’. Google already knows that ‘color’ is related to ‘colour’ and will consider them both to be appropriate matches to a search containing either variant. You do not need to throw in all possible variations to get ranked.
This from Google’s John Mueller:
Does grammar affect SEO?
So it is more a matter of how it is received from a user point of view. If you are a banking web site and you have terrible English on it, then I assume users will lose trust in your web site. But for other things, it is the way the web just comes. Espesially user generated content, you can’t fix their grammar, you probably could but it is impractical.
I don’t know if any of our algorithms specifically look for the grammar and say this web site uses English in a bad way, we will demote it. I don’t know. It is possible but it feels really kind of niche. We can find better ways of finding lower quality content than just checking the grammar. Because something like grammar is really hard to do across the internet, where there is so many different languages and so many variations of languages. We can’t possibly check Swiss German websites for grammar.