They (road helmets, the trail ones are a bit different) are like M&Ms, inner goodness covered by a thin candy shell, in this case the plastic shell with the outrageous color schemes that are an unsuccessful attempt to make the helmet look 'cool' when in fact you're always going to look like a dork with it on.* I have friends who ride and lost that candy shell long ago - for whatever reason - and they just wear the Styrofoam part now.
But I've never bought the 'language is destiny' deal, if for no other reason than even if I change the language to make it easier for you to communicate, it's not going to help, it's not the language that does it, it's the ability to communicate that makes the difference.
* - of course, dork is much better than fool, which is what a head injury gets you.