Language point that may have been missed

[Eric Oppen]

No: HPFGUIDX 54368

I was just rereading GoF to keep off the pangs from knowing OoP is coming
out soon, and noticed something.  _Even when Fleur Delacour is talking to
Madame Maxime or Gabrielle,_ she continues to speak English, albeit wiz an
'orrible French ack-sent.

When the other three champs find out that Harry's a champion too, Fleur says
to Madame Maxime something about "zis little boy" competing.  Later on, even
in a very stressful situation, when she's speaking to her sister whom she'd
given up for dead in the lake, she's speaking English.  "It was ze
grindylows..."

Is this a Flint?