Warning message during R startup on Mac

Got the following warning messages, when run R Studio on Mac.

During startup - Warning messages:
1: Setting LC_CTYPE failed, using "C"
2: Setting LC_COLLATE failed, using "C"
3: Setting LC_TIME failed, using "C"
4: Setting LC_MESSAGES failed, using "C"
5: Setting LC_MONETARY failed, using "C"
>

SOLUTION

1. Open Terminal
2. Run the following command

$ defaults write org.R-project.R force.LANG en_US.UTF-8

KOREAN

$ defaults write org.R-project.R force.LANG ko_KR.UTF-8

FOR SHELL :: .bashrc .bash_profile .zshrc

export LC_ALL=en_US.UTF-8

KOREAN

export LC_ALL=ko_KR.UTF-8

3. Close Terminal
4. Start R Studio again