Hi, Atom doesn't do the translation. It only uses the system in another language, like yours (English, German, Spanish...). In other words, you can choose the language of the metadata (name), but the metadata itself will be presented in English, which is your base language. Unless you've also created the base of your materials in another language. The fact that you find the option of other languages available is so that the user recognizes the metadata in their language, and thus they can translate it themselves if it's not offered.
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Sérgio Rodrigues
Registro Profissional Arquivista Nº 0001852/RS
Especialista em Tecnologias da Inf. e da Com. Aplicadas à Educação - UFSM.