One negative local impact of a global lingua franca, such as English, on places where a different language is spoken is the erosion of local languages and dialects. As the global lingua franca becomes more dominant in various domains such as education, business, and media, local languages may experience decreased usage and prestige. This can lead to younger generations prioritizing the global language over their native tongue, resulting in reduced fluency and, in some cases, language shift or loss.
For example, in regions where indigenous languages are traditionally spoken, the rise of a global lingua franca can diminish community members' ability to communicate in their native language, impacting cultural identity and heritage. This erosion can further lead to a decrease in the transmission of local traditions, stories, and knowledge, ultimately weakening the cultural fabric of the community.