Final answer:
The darkly shaded language on the map is English, spread by colonialism and cultural influence. Lingua franca is a common language for trade, like Swahili in Eastern Africa. Protection of minority languages includes education and legal support.
Step-by-step explanation:
The language that is darkly shaded on the map above likely represents English, considering the historical and global spread of the language through British colonialism and the later influence of American culture and technology. A political factor that contributed to the distribution of the English language is colonialism, specifically the British Empire's expansion and establishment of colonies around the world. For example, in India, colonialism implanted English into the local society and educational systems, impacting the country's linguistic landscape significantly.
A social factor is the technological and cultural influence of countries where English is the primary language. Innovations like the internet, personal computers, and popular culture from Hollywood and American music have furthered the global reach of English. The term lingua franca is defined as a language that is adopted as a common language between speakers whose native languages are different, for activities like commerce and trade. An example of a lingua franca is Swahili in Eastern Africa, which facilitates trade and interaction among various ethnic groups.
Strategies to protect lesser-used or minority languages in the face of globalization include implementing educational programs that incorporate the teaching of these languages, enforcing legislation that recognizes the rights of minority language speakers, and supporting media and publications in these languages to maintain their usage and visibility in society.