est.ce que je peux aller au toilette (if you want to say please) s'il vous plâit.
The usual translation of "go" into French is aller (sounds like "ah-lay"). On the other hand, if you are asking for the spelling of a hypothetical word that French people would look at and naturally...
allez
"go to" = "aller à"
The devil is masculine in French so it's...le diable.
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