fix: English plurals error in transifex should be one and other | FC-55

[OmarIthawi]

Transifex throws a validation error otherwise.

In other languages Transifex will provide the proper plurals.

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[OmarIthawi]

Thanks @volodymyr-chekyrta.

I don't have access to merge the pull request, neither is Brian. Kindly merge it.

cc: @k1rill

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