The term "Korean server" refers to a server located in South Korea, which is commonly used to host various online services and websites. When it comes to the language used on Korean servers, English is widely employed due to its global accessibility and the international nature of online platforms. English serves as a lingua franca, allowing users from different countries to communicate and interact effectively. Therefore, the phrase "Korean server" can be directly translated into English as such, without requiring any specific alteration. The usage of English on Korean servers facilitates seamless communication and collaboration among individuals from diverse linguistic backgrounds.

English has become the de facto language of the digital world, transcending geographical and cultural boundaries. It is the language of choice for international business transactions, academic research, and online interactions. As a result, it is not uncommon to find English as the primary language on servers located in various countries, including South Korea.

The prevalence of English on Korean servers reflects the global reach and influence of South Korea's online services and gaming industry. South Korea is renowned for its robust IT infrastructure, advanced technology, and innovative online platforms. By adopting English as the language of communication on their servers, Korean companies can cater to a broader audience and attract users from around the world.

Moreover, English proficiency is highly valued in South Korea, as it is seen as an essential skill for global competitiveness. Many Koreans study English from a young age and strive to become fluent in the language. This proficiency in English extends to the online sphere, where users are accustomed to navigating websites, forums, and online games that predominantly use English.

In addition to English, Korean may also be present on Korean servers, especially in content specific to the local market. For instance, some websites and gaming platforms may provide Korean-language options to cater to the domestic user base. However, English remains the primary language for broader accessibility and inclusivity.

In conclusion, the term "Korean server" is directly translated into English without modification, reflecting the widespread use of English as the lingua franca on online platforms. The adoption of English on Korean servers enables effective communication and collaboration among users from different countries. It also highlights South Korea's prominence in the global online services and gaming industry. While Korean may also be present on Korean servers, English serves as the main language to ensure broader accessibility and inclusivity in the digital realm.