[Vuejs]-Computed property in other component Vue 3

Bro, first You need to make work some functions or use route from backend to make translate work, then the template that you got with original values, type it compiltely same one but with using translated values. And use function that when u click on translate button to see on your screen translated version. This is not the best option for your site or what ever u work on but it will work. With data code and info that You gave this is maximum that we can do here.
Also there is one more option to create 2 navigation headers one original one and one with translated values and try to import both in same template but then You need to write function to call right one when You click see translated or see original one.