Yes, foreigners can work in South Korea without speaking Korean, especially in IT, engineering, English teaching, international companies, and research roles where English is widely used. However, Korean language proficiency significantly improves job opportunities, workplace integration, and long-term career growth. Customer-facing roles, caregiving, hospitality jobs, and public service positions often require at least basic Korean (TOPIK Level 2 or higher). Learning Korean also helps with visa transitions, permanent residency applications, and daily life in Korea. While not always mandatory, Korean proficiency gives foreign workers a strong competitive advantage.