Click sometimes is not OK with C.UTF-8; anecdotally, en_US.utf-8 can work where the formal doesn't. Should make this a configuration parameter and try to make the default be based on the setting in the host environment.
Needs some work, as it turns out that standard languages are not available in docker containers (the testing platform), and presumably other situations, so need a thorough backup.
Click sometimes is not OK with C.UTF-8; anecdotally, en_US.utf-8 can work where the formal doesn't. Should make this a configuration parameter and try to make the default be based on the setting in the host environment.