If you want to try to use nuxt-i18n
check the link( https://nuxt-community.github.io).
and I wrote very simple codes which can be tested.
install : (you can use npm also, in that case remove — shamefully-faltten)
pnpm install nuxt-i18n — shamefully-flatten
explain:
paths — follow strategy : ‘prefix_and_default’
/en
/fr
/es
/ : default lang — en
also check this. You can just use vue-i18n.