ＯＫ[おーけー] (oke)

OK僕ぼくに任まかせてくれ

OK. Leave it to me.

飛田課長が、太鼓判を押した企画書ならクライアントも一発ＯＫだろう。

When Tobita gives a plan his seal of approval, the client accepts it at first glance.

彼はＯＫのしぐさをして答えた。

He responded by giving the "OK" gesture.

ＯＫ！今日はもういいよ。

Okay, that's enough for today.

ＯＫ！今日はこの辺で。

Okay, that's enough for today.

同じ文でも、ネイティブなら即ＯＫで、非ネイティブだとダメというのに矛盾を感じます。

I find it contradictory that the same sentence, when used by a native speaker, is automatically OK, but not when used by a non-native speaker.