Complex sentence: Koreans in Paraguay formed one of the earliest Korean diaspora communities in Latin America; however, they were always overshadowed by the larger Korean communities in neighbouring Brazil and Argentina, and since the late 1990s, their population has fallen significantly.
Split into simpler sentences: Koreans in Paraguay formed one of the earliest Korean diaspora communities in Latin America. However, they were always overshadowed by the larger Korean communities in neighbouring Brazil and Argentina, and since the late 1990s, their population has fallen significantly.