Adding APT source files really shouldn't depend upon your locale.
Note that as a workaround you can do the following:
locale-gen en_GB.UTF-8 LANG=en_GB.UTF-8 add-apt-repository -y ppa:ondrej/php-7.0
Adding APT source files really shouldn't depend upon your locale.
Note that as a workaround you can do the following:
locale-gen en_GB.UTF-8 en_GB.UTF- 8 add-apt-repository -y ppa:ondrej/php-7.0
LANG=