oneThis plural form is used for numbers like: 1
%{count} pending invitation
otherThis plural form is used for numbers like: everything else
%{count} pending invitations
You have %{count} pending invitation
You have %{count} pending invitations
%{count} pending invitation
%{count} pending invitations
You have %{count} pending invitation
You have %{count} pending invitations
You have %{count} pending invitation
You have %{count} pending invitations
You have %{count} pending invitation
You have %{count} pending invitations