problem mapping domain.com/subfolder/

First of all, thanks a lot for this great plugin, I’m using it on some sites and works great!

However I’m trying to install it on a new site in order to map subfolders (where folders are languages like /es/, /en/…):

site id=1: http://www.domain1.com

site id=2: http://www.domain2.com
site id=3: http://www.domain2.com/lang_2/
site id=4: http://www.domain2.com/lang_3/

site id=5: http://www.domain3.com
site id=6: http://www.domain3.com/lang_2/
…

It is mapping correctly to domain1.com, domain2.com…but there’s some trouble mapping for example http://www.domain2.com/lang_2/ as it looks like it is trying to show a page from the previous site (the one without subfolder) like http://www.domain2.com/some-page-named-lang-2/ and returning a 404 error.

Is it possible to achieve this kind of domain/subfolder/ mapping? I’ve searched previous posts with similar questions but didn’t found out.

Am I missing something or that’s not possible to achieve?

Thanks a lot (and sorry for my english writing!)

https://ww.wp.xz.cn/plugins/wordpress-mu-domain-mapping/