cislate(verb) – to convert into a different variety of the same language
He cislated "I realised the centre is coloured grey" into American English as "I realized the center is colored gray".
zombielanguage(noun) – a language that has died but was later revived, and gets modern vocabulary by borrowing or calquing from living languages
Cornish is a zombie language as its last native speaker died in the 18th century, but now it feeds on living languages like Welsh and English to survive.