as far as I know
Hasta donde sé, no existe tal palabra.
As far as I know, there is no such word.
Hasta donde sé, él no está casado.
As far as I know, he is not married.
Hasta donde sé, él es inocente.
As far as I know, he is innocent.
AFAIK.
Hasta donde sé, esta es la primera.
As far as I know, this is the first one.
Hasta donde sé, él no es perezoso.
As far as I know, he isn't lazy.
Hasta donde sé, solo una persona puede hacer eso.
As far as I know, only one person can do that.
— El jardín de los pecadores: Paradigma paradoja (Paradoja espiral) (2008)
Hasta donde sé, él no lo hizo.
As far as I know, he didn't do it.
— Estación central de Brasil (1998)
Hasta donde sé, aún está haciendo su trabajo.
As far as I know, he's still doing his job.