Hi everyone!! I'm Spanish (Europe), born and living in Madrid city, so both my writing & speaking are perfect Castilian Spanish. I have a degree in Biology and worked for many years as a Health & Safety Tech. in different companies in which, I worked as a professional trainer teaching the staff. I worked also an Environmental Tech. for several car companies. So I am fluent in technical vocabulary. Native in Castilian Spanish, no slang, Latin American, or Americanism words. I use the Spanish described in the RAE (Real Academia de la Lengua Española)