Locale en_CH

Sources :

• https://askubuntu.com/a/162714/868786
• https://lh.2xlibre.net/locale/en_US/
• https://lh.2xlibre.net/locale/fr_CH/

Installation

tested on Ubuntu 18.10

wget https://raw.githubusercontent.com/cbaconnier/ubuntu-locale-en_CH/master/en_CH
sudo localedef -i en_CH -f UTF-8 en_CH.UTF-8 -c -v
sudo mv en_CH /usr/share/i18n/locales/
echo 'en_CH UTF-8' | sudo tee --append /var/lib/locales/supported.d/en
sudo locale-gen

• Change the regional settings with the new locale in Language Support > Regional Formats and search for Switzerland (English)

Next time you log in, the locale should be in use.