Often, these differences are a matter of relative preferences rather than absolute rules; and most are not stable, since the two varieties are constantly influencing each other, and American English is not a standardized set of dialects.
Te su razlike često stvar relativnih preferencija, a ne apsolutnih pravila; a većina nije stabilna, jer dvije vrste stalno utječu jedna na drugu, i Američki Engleski nije standardizirani skup dijalekata.