Add Translation was missing, we have added it just now.
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x mins ago, x hours ago cannot be changed as it comes from a 3rd party package, for now, you could disable this:
Admin >Settings > All Settings > Customer App > Beautify Date/Time
Carlos All days of the week and months (Mo, Tu / Jul, Aug): presents in the Order Scheduling plugin. Also, I need to remove or change the st after the day of the month.
We will see this in the future if it's possible, currently not on the immediate roadmap.