Overriding US language files to change a couple of terms

Damn Yankees! I had seen various messages of yours indicating that the American translation of “rota” would be “schedule”, but once I started using it I got a little confused and realized we may not be using the right word. The tip off was a message I saw that said the Aussies and Kiwis used “roster”. That was a word I recognized and seemed to fit in context.

Just to be clear, I’m only 1 of 380 million over here, and only relaying my own understanding. To be fair, here is what I found when I googled “what is the meaning of the english word rota”:
synonyms: roster, list, schedule, register, timetable, calendar

To my mind, I would expect a “Calendar” to be a list of Events with Dates and Times.
ex: Sunday Worship, 24-March, 09:00am

Then I would expect a “Schedule” to be a chronological breakdown of a Calendar Event:
Time Event
08:00 Unlock doors
08:45 Turn on and cue up A/V system
08:50 Choir enter and take positions
08:55 Light candles
09:00 Pastor enters, begin service

…and a “Roster” would be the tasks and people needed to accomplish the above Event Schedule:
Event: Sunday Worship
Task Name
A/V – Bob
Accompanist – Sally
Choir Director – Kevin
Liturgist – Barb
Greeters – Sue, Mike
Ushers – Don, Martha
Clergy – Jenny

For Americans, this would be like a sports team roster:
2018 Women’s Volleyball Roster:
Outside Hitter – Becca Latham
Setter – Andrea Eddy
Defense – Lauren McManus
etc.

As I do more searches for examples of “rota” in use, I realize that Americans don’t have a good equivalent and may be mixing Schedule and Roster as a replacement. It seems that Rota is a combination of 3 things, Date, People, and Task. Whereas a Roster is just 2 (Task and People), and Schedule is just 2 (Date and People, or Date and Task).

Here is an example from Collins Dictionary (https://www.collinsdictionary.com/us/dictionary/english/rota):
“We have a rota which makes it clear who [People] tidies the room [Task] on which day [Date].”

In regards to Church Admin, the Rota for a Sunday worship service may look like:
[Date] 24 March
[Task] A/V – [People] Bob
[Task] Usher – [People] Don, Martha
etc.
[Date] 31 March
[Task] A/V – [People] Steve
[Task] Usher – [People] Debbie, Julie
etc.

Each Task would then have a Schedule/Roster:
[Task] Usher
[Date] 24 March – [People] Don, Martha
[Date] 31 March – [People] Debbie, Julie
etc.

In Program Management terms it seems that maybe a Rota is a Project that has Dates, Tasks, and Resources (People).

I’m not sure I helped clear things up for a solution, or confused them more. Considering we both speak, um, English, I never expected this to be such a grammar and translation issue! I’ll keep thinking on this and see if I can make some helpful suggestions.
Thanks!
Matt