Nonchord tone

The art of embellishment is the knowledge and use of musical ornamentation. This is an old art and many volumes have been written on this craft. Some ornaments are the trill, mordent, arpeggio, and grace note. There are many, many others. Each nationality and historical period have used intrinsically specific ornamantation, thus, the embellishment of a J.S. Bach piece is more than likely not appropriate for a piece written by Chopin; this is for two reasons notwithstanding that the piano is to be used for the Chopin instead of the organ or harpsichord: Bach is a composer of the 18th century Baroque in Germany, and Chopin a Polish/French composer of the 19th century. Very different times, very different nationalities.