What do expats find most challenging?

"One of the most challenging aspects of the local culture for expats in Seoul is the language barrier. Many Koreans speak only limited English, making it difficult for expats to communicate with locals. Additionally, the Korean culture is very hierarchical, and expats may find it difficult to adjust to the expectations of respect and deference that are expected of them. Furthermore, the Korean work culture is very demanding, and expats may find it difficult to adjust to the long hours and intense work ethic. Finally, the Korean culture is very conservative, and expats may find it difficult to adjust to the strict social norms and expectations," mentioned another expat when asked about moving to Seoul, Korea.