Well, honey, that's just a bunch of gibberish from the movie "Bedknobs and Broomsticks." It's supposed to be a magical spell that doesn't really mean anything in English. So, if you're looking for a deep and profound translation, you're out of luck. Just sit back, relax, and enjoy the whimsical nonsense of it all.
Treguna mekoides trecorum satis dee
The words mean nothing. Disney isn't J. K. Rowling. They just came up with some impressive-sounding nonsense words which sound vaguely like Latin.
The one she casts repeatedly is a transfiguration human-to-animal spell. We never hear the exact name. It goes, "Filigree, Apogee, Pedigree, Perigee. The most notorious spell from the entire movie is the Substitutiary Locomotion spell and is engraved on the 'Star of Asteroth'. It goes, "Traguna, Mekoides, Trecorum, Satis dee". The "Famous Travelling Spell" that Ms. Price casts over Paul's Bedknob goes, "Hellbore, Henbane, Aconite, Glow worm fire, Fire fly light." She also uses an "All purpose cut-off spell" but we never see it preformed or hear the words in the movie.