Materials and knowledge about the language leads to more people potentially discovering it. I can far more easily persuade someone to use Rust, if I share the website with them in their native language.
Consider the reality that not every nation is advanced in English like Sweden or other European nations.
Anyway, the old site did have i18n, meaning that they did care about it. Not only did they care about i18n, they also had more niche languages, which is quite rare for an open source project. The alternative is basically saying "just learn English in order to read about Rust and why you may or may not want to use it". I find this unacceptable.
So it's very puzzling to me that the new website entirely ditched i18n–it's incongruous to what I perceive the quality of the rust team is capable of.