if you do add this please remember about SEO featues, hreflang tags etc. https://www.seerinteractive.com/insights/international-seo-hreflang-guide

It is necessary, the white label must be reinforced in general and specifically the issue of translation seems very necessary to me since many clients do not speak English

Many clients are wary if they do not have a backend in their native language; it would be important.