In Foucault’s Pendulum, Umberto Eco suggests a technique for making one language look like another:
Abu, do another thing now: Belbo orders Abu to change all words, make each ‘a’ become ‘akka’ and each ‘o’ become ‘ulla,’ for a paragraph to look almost Finnish.
Akkabu, dulla akkanullather thing nullaw: Belbulla ullarders Akkabu tulla chakkange akkall wullards, makkake eakkach ‘akka’ becullame ‘akkakkakka’ akkand eakkach ‘ulla’ becullame ‘ullakka,’ fullar akka pakkarakkagrakkaph tulla lullaullak akkalmulast Finnish.
In a 1955 letter to W.H. Auden, J.R.R. Tolkien described his discovery of the Finnish language: “It was like discovering a complete wine-filled cellar filled with bottles of an amazing wine of a kind and flavor never tasted before. It quite intoxicated me …”
from Futility Closet https://www.futilitycloset.com/2018/02/15/a-cloak/