For anyone that doesn't understand the speech mixup and the FINA mention, the speech mixup is that she, instead of talking informally, she instead used formal language, which revelead that she's forcing herself to talk informally. The FINA mention is just about how his eyes when he lies moves around a lot like a swimmer for the FINA organisation, an olympic world cup federation that involves water sports championships. He then used that against her when she lies and says that just how she normally (informally) talks, that her eyes also swam around like a swimmer for the FINA championships.