In an article titled "WordPress Multisite and SEO: All Your Questions Answered", rachel McCollin said that:
<<if you’re using subdirectories, then Google will do its best to treat them as separate sites if the content makes it clear that that’s the case.>>
But how does Google evaluate the contents to decide unity or separation?
In our case, we setup a multisite of four subsites - each subsite dedicated to one language.
One is English, the rest three are languages currently not supported by Google.
Yet, I recall reading a while ago, (on Google's note titled localization? or something) that it is advisable to write urls in English if and when language of the content is not supported by Google.
Therefore, the entire network is using English on post slugs and taxonomy slugs, even if the text of each subsite is different.
Does that confuse Google from understanding the sites as different or any other way?
Thanks in advance.
P.S. - the front/main subsite which serves as index page and set to non-index]