The primary advantage of using different languages on a domain is that other people of different languages can approach you and conveniently use your website. By providing multi-language options, you will be open to customers of other languages like German, French, Italian, Portuguese, Japanese, Arabic, Spanish, and many more. In this way, you can reach the maximum audience. Moreover, it will assist you in enhancing your Brand's image and you can create competition around you. Your brand or business can grow and become famous internationally. This also helps to improve conversation rates. In addition to this, The idea of providing different language options, it will help you in a customer-centric approach. 

If you can provide information in the customer's language, they will be attracted to your business and will appreciate you more.