oneThis plural form is used for numbers like: n in 0..1
%{count} projet
otherThis plural form is used for numbers like: everything else
%{count} projets
%{count} projet
%{count} projets
%{count} projet
%{count} projets
%{count} projet
%{count} projets
%{count} projet
%{count} projets
%{count} projet
%{count} projets
%{count} projet
%{count} projets
%{count} projet
%{count} projets