I got a data.table base. I got a term column in this data.table
class(base$term) [1] character length(base$term) [1] 27486
I\'m able to remove
Ok the way to solve the problem :
Encoding(base$terme[2]) [1] "UTF-8" iconv(base$terme[2],from="UTF-8",to="ASCII//TRANSLIT") [1] "Millesime"
Thanks to @nicola