Search engines are pretty smart but why make life harder. Here I'll show you how to tell a search engine what language or languages a page on your website is using.
This is almost the very first thing your code should declare so right up at the top should be something like:
Which tells search engines the main content of your page is delivered in English. To check if your website is using the language declaration
WordPress includes it as standard but you might see a slightly different set up:
Which means English language site using the US version of the English language. That's fine as well.
If a page has a mix of languages each one should be declared in the code like this:
In Wordpress or other similar platforms don't try and add this in the main text editor. Click the 'Text' tab (top right) first and then add it