I've made my own Pig Latin translator that is pretty easy to follow through. Feel free to use this if you decide that you like this one better.
Code
original = raw_input('Type in a word').lower()
if len(original) > 0 and original.isalpha():
print original
else:
print 'Type in a word or phrase that contains only alphabetical letters and more than 0 letters.'
def pig_latin():
first_letter = original[0]
base_word = original[1:]
new_word = base_word + first_letter + 'ay'
print new_word
return original
pig_latin()
pig_latin()