Hariko has two national languages, Harikén and English, which are spoken by the Hari ethnic group, and the white Sealandic minority, respectively.
Harikén uses Hangul and traditional Chinese characters, called ssóngji, in its written form.
English uses the standard Latin alphabet.
Harikene computers come with the national standard keyboard, the Ransugeo-104 layout, which has jamo in Dubeolsik layout, Chinese radicals for Cangjie input, and a modified Dvorak layout for English. The AltGr button toggles between the three input methods if tapped, and has regular AltGr function if held down. To the left of the return button is the “Anyan” key that changes the direction of the script, either top-to-bottom, or left-to-right.