My Dutch friend were telling me that in Dutch there are technically two ways of using "the" in Dutch (het), but that there are no grammatical rules for this.
I don't think that is quite the case.
In my own language, Danish, we have "En" and "Et". In English this would be "a" and "an". In English the reasoning for these two are simple to explain. Vowel or non-vowel sound on the noun.
In Danish however, I could tell you that any Danish person knows when to use either but that they can't explain the rule at all. They "just know when to use it". The rule have to do with gender of the word (I later discovered), but we never apply the rule consciously because we know subconsciously that what we say is right.
I believe it's the same in Dutch with "Het". I am sure there is a grammatical rule for the use of this. So if anyone knew I'd love to hear it as I haven't been able to find a definitive answer for this.