Hi Ewan,
Thanks for this interesting event. I just had a conversation with a researcher who wants to create a dictionary for a small language that has no dictionaries. We discussed the use of Wiktionary and Wikidata - it looks very promising, but the current state seems not mature enough at least until "Phase beta" of development:
https://www.wikidata.org/wiki/Wikidata:Wiktionary#Our_plan
Anyway, Wikidata and planned support of Lexemes should be made more public at the event. The current program of Celtic Knot contains nothing about Wikidata and only one talk related to Wiktionary, so it would be great if Léa, Lydia, Daniel or someone else from the development team could give an introduction.
Cheers Jakob