Can't clear check_language_envvar("LC_ALL") warning when running R scripts

Whenever I run an R script I get the following warning that I can't clear:

Warning messages:
1: In check_language_envvar("LC_ALL") :
  Changing language has no effect when envvar LC_ALL='C'
2: In check_language_envvar("LC_ALL") :
  Changing language has no effect when envvar LC_ALL='C'

When I type locale into iTerm, I get the following output:

LANG="en_US.UTF-8"
LC_COLLATE="C"
LC_CTYPE="C"
LC_MESSAGES="C"
LC_MONETARY="C"
LC_NUMERIC="C"
LC_TIME="C"
LC_ALL="C"

I have absolutely no idea how to solve the issue, any help would be greatly appreciated.