 This was one of the reasons why he wrote all of his works in Dutch and left the translation of them for others to do.The other reason was that he wanted his works to be practically useful to people who had not mastered the common scientific language of the time, Latin.Thanks to Simon Stevin the Dutch language got its proper scientific vocabulary such as "" (""kunst van het gewisse of zekere"" the art of what is known or what is certain) for mathematics, "" (the "art of nature") for physics, "" (the "art of separation") for chemistry, "" (the "art of stars") for astronomy, "" (the "art of measuring") for geometry.