I contacted Bill Staines once and asked him why the last few lines are in French and all the rest is in American English and he answered "There is no particular reason why the last few lines of First Lullaby are in French while the rest are in American English. I just thought it sounded nice and flowed well." After being unable to find the meaning of "the sky is in your eyes" which is the translation of the second French verse, I contacted Bill Staines to ask him what the line means and he answered "The line simply means that your eyes are blue."