Loner Complete is available in Italian, if you need it.
Since Italian and Spanish are more brother than cousin languages, it would be easy enough to read it without too much fuss
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Yes, you are right about our languages being quite close, but I am so used to reading English that it somehow seems easier for me. I am going to have a look at the Italian language Loner and see if I am able to understand enough of it to use it. And if there is a physical edition of the complete Italian version, I will consider buying it. Thanks for your reply!