After Chalamet's Wonka appears to be unaware of the people from Loompaland, Grant's character opts to "refresh your memory" by playing him a tune and starting to dance.

Source: https://www.bbc.co.uk/news/entertainment-arts-66172861?at_medium=RSS&at_campaign=KARANGA

Fast forward nearly 60 years, and Chapter 16 of the latest edition of the book is significantly changed, with Wonka telling the children that the Oompa-Loompas were in fact 'Imported direct from Loompaland.'

Source: https://www.dailymail.co.uk/femail/article-12800419/The-dark-Roald-Dahls-Willy-Wonka-Hollywood-including-latest-film-starring-Timothee-Chalamet-glossed-sinister-elements-authors-1964-novel.html?ns_mchannel=rss&ns_campaign=1490&ito=1490