A particularly intriguing (to me) version of this kind of
user-centered copy is not uncommon on sites in French and uses first-person verbs: “I accept,” “I start”. As opposed to the infinitive “Comment,” “Sign in,” etc.
Specifically, Spanish translations interpret these as representing an impersonal description of the action, and thus the buttons are labelled using the infinitive: Abrir, Editar, Guardar and Borrar. Catalan versions, on the other hand, have interpreted the verbs as instructions aimed at the computer, and translate them in the imperative: Obre, Edita, Desa and Esborra.