sudo apt update

sudo apt install git lsb-release libegl1-mesa-dev libgbm-dev libegl1-mesa


git clone --depth=1 https://github.com/RetroPie/RetroPie-Setup.git

cd RetroPie-Setup

chmod +x retropie_setup.sh
sudo ./retropie_setup.sh

Check Locale:

locale

Should Look Something Like This:

LANG=en_US.UTF-8
LANGUAGE=en_US:en
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=en_US.UTF-8