Multisites and fetching data

Hi,

I’d like to fetch feeds from my WordPress /blog/ onto my main site (which is not using WordPress).

This is straightforward : https://codex.www.ads-software.com/Integrating_Wordpress_with_Your_Website
Our site however has several languages and we need WordPress to also be available in those languages, so the best solution seems like to use https://codex.www.ads-software.com/Create_A_Network – a Network of sites such as ourdomain.com/blog/ – for the UK version – and ourdomain.com/blog/de/ – for the German version, etc.

However, WordPress (the above link) says “These directions will not work on a MultiSite Network.”, but offers no solution to actually make it work.

My solution at the moment is to build a custom feed or read the RSS feeds per site and take the data that I need, onto my main site. Has anyone done this before or have any tips on whether to use the blog’s /blog/feed/ or an alternate custom-built approach? Note that I also use custom fields but the /blog/feed/ seems to return custom fields as well, so it looks fine, except it returns way more data than I actually need so I’d like to have a solution to ‘fetch’ only the fields that I need.

Many thanks!