I realized I'd got a sizeable non-UK readership, so I try when I remember not to use too many British colloquialisms.
I enjoy your little colloquialisms.
I rejected all local colloquialisms to arrive at a dialog that had a certain naivety and innocence.
Brush off the thesaurus and replace those colloquialisms with formal modes of speech.
This is how you learn all of the particular colloquialisms, idioms and even emotions tied to how a language is expressed.