An email goes out in the chosen language
Invite an account
An email already in use is refused, with a link to the existing account.
Role
One role per person: it decides which space the person lands in when signing in.
The person can change it from their profile. Content that is typed in (steps, instructions, notes) is not translated.
Leave empty for an internal technician. When filled in, the company name appears next to theirs on interventions.