Dear Sir or Madam,
My name is Juan Francisco and I'm a young economist from Argentina. Apart from my background at economist, I have realy good skills at writing both Spanish and English.
Moreover, Spanish is my native tongue so it would be easy to do the job you require. A few months ago I was living at Korea and I worked for a company that needed several questions in Spanish to test a software.
If you have any doubts or questions please feel free to contact me.
Best regards,
Juan Francisco Rueda.