Spanish translation suggestions

[lauracion]

• Title capitalization in Spanish is different than in English
• It was not clear what it meant by "beneficiarios externos" and this expression is not gender-neutral, that is why I am proposing a different expression
• Changed verbal person to the informal second person (i.e., "tu" rather than "usted"). This is the choice of some of the text on this website and that of the Spanish contextualization of OS101.