oneThis plural form is used for numbers like:  1
1 error prohibited this %{resource} from being saved:
otherThis plural form is used for numbers like:  everything else
%{count} errors prohibited this %{resource} from being saved:
1 error prohibited this %{resource} from being saved:
%{count} errors prohibited this %{resource} from being saved:
1 error prohibited this %{resource} from being saved:
%{count} errors prohibited this %{resource} from being saved:
1 error prohibited this %{resource} from being saved:
%{count} errors prohibited this %{resource} from being saved: