Display accented characters

Accented characters do not seem to be displayed correctly when they come from the global.R file despite the setting of the locale R process with the following command:

Sys.setlocale("LC_ALL", "fr_FR.UTF-8")

Maybe the following syntax works:

Sys.setlocale("LC_ALL", "fr_FR.utf8)

Because in the help page of the Sys.setlocale() function it is written:

Sys.setlocale("LC_TIME", "de_DE")        # Many Unix-alikes
Sys.setlocale("LC_TIME", "de_DE.UTF-8")  # Linux, macOS, other Unix-alikes
Sys.setlocale("LC_TIME", "de_DE.utf8")   # some Linux versions