English and Dutch differ radically concerning the use of punctuation in numbers and amounts of money. In fact, the rule is quite simple: where Dutch uses a comma, English uses a full stop; and where Dutch uses a full stop, English uses a comma:

Note incidentally that in current spoken Dutch one quite often hears twee punt driealongside twee komma drie, presumably under influence of the computer. In English there is of course no variation: two point three is the only possibility.