Thanks for working on this, it's epic! I really miss the links though... Please update: * https://meta.wikimedia.org/wiki/Requests_for_comment/Interproject_links_inte... ; * documentation of the extension(s) offering this feature; * https://bugzilla.wikimedia.org/show_bug.cgi?id=708 .
I expect the early adopters of template https://www.wikidata.org/wiki/Q5830969 (all French and Italian projects) will jump on this feature immediately, but before opening a discussion I need to know 1) how to link non-Wikidata projects, 2) how to have multiple links to a project, 3) how to customise the labels, for a start.
Nemo