Medieval Latin and classical Latin are somewhat different -- in particular, Medieval Latin tended to take on the flavor of whatever the native language of its author was. Most high schools teach classical Latin. So you want to make sure that you're getting a translation from a medievalist who also speaks Middle English.
If anyone can do non-wrong Latin, I could use a translation of the following for HPMOR. The original is supposed to be circa 1200.
No rescuer hath the rescuer.
No Lord hath the champion,
no mother and no father,
only nothingness above.