The UTF-8 Unicode is a standard coding system developed to display digital texts such as webpages, emails and csv files flawlessly. (For example letters with punctuation marks such as: á/ä/â/ñ)
Most programs support UTF-8 Unicode and you can choose to save your file to a UTF-8 encoding system. As long as you will use this coding systen you will not encounter any problems with these kind of texts. Want to know more about how you can save a CSV file with UTF-8 Unicode, click here!