What language? Sounding fun and inappropriately childish aren't necessarily the same thing - though language pragmatics are vastly complex and are easier to emb

What language? Sounding fun and inappropriately childish aren't necessarily the same thing - though language pragmatics are vastly complex and are easier to embody than really explain. Anyway I'd probably be more curious than judgemental about a language I'm not a native speaker of. English is my own language, which is a different matter. The locution sounds inappropriately childish to me, so I was wondering if this was just the norm in the US (which often is oddly prim in some ways, wildly licentious in others, compared to some other English-speaking places).