She can speak Thai!

Have just been presented with a glass of some sort of fruit punch which tastes like bubblegum. I kop-khun-ka'd the lady who brought it in (one of the caretaking staff) and she'd ka'd me back before she clicked I'd thanked her in Thai, and grinned to the other teachers with an approving "poot tai dai!" It's worth learning Thai just because Thai people are so impressed!