Related Clues:

• The French can get this from Rome, in a manner of speaking
• One might have to do some alteration perhaps in here for 7 down
• The French can from Rome may be tongue
• The French can not be French
• The classical way to have been lying about tea
• The French 27 across is not in French
• You are, in short, between two of this, in short
• The French can be not in French
• An old tongue was lying about a little tea
• Like many mottoes
• Hogwarts motto language
• Julius Caesar's language
• With 42-Across, one who might memorize 64-Across?
• Source of much legalese
• Language for legal terminology