International Museum Day (18 May)

"This day was created in 1946-7 by the International Council of Museums....The day has been recognized since 1977...."
OK, it's got some origins and some depth. But I'd like to know more about these subtle ontological gradations in the histories of Days. What was it like during the time when it was created, but not recognized?
But to the topic: Museums of Language!
Crystal reminds us that we visited one on 15 April -- that "House of Vigdis" in Iceland.
It seems there are others...
"largest" - Planet Word, Washington, D.C.  (est.2020) - great building!
https://en.wikipedia.org/wiki/Planet_Word
https://planetwordmuseum.org/
"one of the smallest" - Mundolingua, Paris (opened 2013) - looks more playful
https://www.mundolingua.org/
https://en.wikipedia.org/wiki/Mundolingua
"oldest in the world" - Aasen Centre, Norway - "unbroken history from 1898"
https://presentations.thebestinheritage.com/2016/CentreForNorwegianLanguageAndLiterature
local focus - Canadian Language Museum, Toronto - nice grounds!
https://languagemuseum.ca/
https://en.wikipedia.org/wiki/Canadian_Language_Museum
proposed, but fell through - London (1990s), Barcelona (2000s)
mobile - World of Languages pop-up museum, Cambridge and On the Road,
2019, curtailed by pandemic
https://www.cam.ac.uk/stories/worldoflanguages

online - National Museum of Language - physical facility in College
Park, Maryland, 2008-2014, since then "virtual museum"
https://en.wikipedia.org/wiki/National_Museum_of_Language
and, finally, a vast list of them:
https://www.nynorsk.no/wp-content/uploads/2020/02/814-20180314-Language-museums-OG.pdf
Anybody visited (or been visited by) any of these?