The shell helps protect vulnerable organisms from threats. My interpretation of the Nautilus shell is divided into smaller pieces which are metaphorically held together with the unified color scheme.
Cultures are rapidly being dissolved either through migration due to lose of native habitat, or through misguided attempts to educate and modernize. Many indigenous languages are under threat of extinction.
Language, are what makes a culture vital, giving it the ability to communicate. The shell is a reminder that we must try to protect the diversity, in order to preserve our unique histories.