If you mean some static texts, they are all available in the Loco plugin translation editor. If you mean email tokens please select an email event when you add a new email, once you save changes a list of tokens will appear in the Details box.
You can change the “from” email using third-party plugins, e.g. YaySMTP (it’s also recommended to make your website emails trusted).
An email address that is considered to be from a valid user rather than spam or malware. Addresses marked as trusted senders go into the inbox rather than the spam folder.
You can use any SMS plugins integrated with SMS services of your choice (e.g. Twilio), but triggering SMS messages that duplicate emails would require customizations.