Super shameless plug, but easy internationalization for email is something we've added to Sendwithus. We're working with multiple partners on it (sample at http

Super shameless plug, but easy internationalization for email is something we've added to Sendwithus. We're working with multiple partners on it (sample at https://www.sendwithus.com/translations https://www.sendwithus.com/translations), but are still looking for more beta users of the feature.