Complex sentence: In the past, there was no distinction made between Sheng and Engsh, but the youth speakers of both languages noticed their inability to understand each other properly, as the languages had evolved differently primarily due to the different economic backgrounds.
Split into simpler sentences: In the past, there was no distinction made between Sheng and Engsh, but the youth speakers of both languages respectively, noticed their inability to understand each other properly. Clearly the languages had evolved differently primarily due to the different economic backgrounds.