oneThis plural form is used for numbers like: 1
%1$s word out of %2$s learnt
otherThis plural form is used for numbers like: everything else
%1$s words out of %2$s learnt
%1$s word out of %2$s learnt
%1$s words out of %2$s learnt
%1$s word out of %2$s learnt
%1$s words out of %2$s learnt
%1$s word out of %2$s learnt
%1$s words out of %2$s learnt