The plural of taco is tacos.
When something is plural, it means more than one.
An example sentence is: The seagulls swooped down and snatched our tacos.
I was taught "taco" was the plural of taco.
Tacos
Latches.
slides
Clouds
daddies.
axes
circus's
I think perhaps you are trying to spell countries, as in more than one country.
Trophies
The correct spelling is "provinces."
spell it out - there is more than one ADEA
One activist. Several activists.
Bills