I tried to make an acceptance letter for Luna Nova. I use 2017 because that’s the year the TV series aired. The Luna Alphabet was created using this site and spells out “Luna Nova Magical Academy” (I think “Magic Academy" sounds better but it was for symmetry’s sake).

This is roughly based off of the acceptance letter that we see Akko get in the first chapter of the LWA Manga by Teri Terio: