1. It has been calculated that half the world's languages are no longer being learnt by the children of native speakers. California (USA) is home to 50 Native American languages, yet most are only spoken by people more than 70 years old. In 1995, the world's last speaker of Northern Pomo Indian died in the same State. In learning a common language, minority language speakers should consider (and be helped to maintain) the common language as their second language, their own language as their first.
2. Language vitality and economic viability are two sides of the same coin; cultural and linguistic diversity can be an important source of innovation and dynamism.