Root = A shag, a fuck, having sex.
Mobile = A Cell Phone.
Franger = Condom.
Or, to translate it into Very, very english.
"My greetings on this fine morning to you, sir!"
"My greetings to you too, old chap, If you'll pardon my brevity, I'm just contacting you via this mobile telephone to convey to you that I shall be arriving shortly to transport you to the family home, also, I would like to inquire upon your general state of wellbeing and happiness, and also, what has transpired upon your night of revelry and merrymaking?"
"Ah! The night has been exemplary, old chap, and I have found myself in the pleasure of the company of a fine young woman of good breeding and even finer upbringing, we have been conversing at length this night."
"I say, Good show, chap! If you'll pardon the intimacy of my inquiry, might I ask if you believe it likely that your interactions with this young lady will result in the same actions that a man and a woman bound in marriage traditionally engage in, that is to say, to lay with this young lady in the biblical sense of the term?"
"I do believe that this is a possibility, old chap, if I do manage to avoid any egregious faux pas, as it were."
"Brilliant show, good sir! Do ensure to properly armor one's masculine organ against any of the more unplesant things that this young lady may unwittingly carry, and indeed, to prevent causing her to become, if you would pardon me for being so blunt, pregnant. I shall contact you upon the new day at the best opportunity."