Final answer:
Different brain structure among different groups of people is NOT a reason for linguistic divergence. Language standardization efforts are influenced by migration, political events, and global integration, but not by neurological differences.
Step-by-step explanation:
The efforts to standardize languages are taking place globally, influenced by a variety of factors such as migration, political events, and globalization. However, the option that is NOT a reason for linguistic divergence is: "Different brain structure among different groups of people". This is simply not a factor in language change or standardization. Efforts to standardize languages may involve promoting a single language for international communication, like English, due to its prevalence in technology, air travel, and popular culture. Conversely, linguistic isolation can maintain language diversity, and this diversity is often lost through processes such as colonialism, where indigenous languages are suppressed.
Linguistic divergence can occur through various means such as migration or political events, but not due to differences in brain structures. Moreover, languages are often seen as a path to employment and trade, leading some to abandon their native tongue for more widely spoken languages. While languages that sound similar and have the same meanings may suggest a relation, it's inadequate as a sole criterion because language evolution involves complex changes in syntax, grammar, and usage over time.