The Alternian Alphabet refers to character sets used in Homestuck and Hiveswap to represent the Troll language. This Alternian translator translates the alphabets to Alternian alphabets.
This translator works based on custom fonts served from the internet (@font-face). When you copy and paste unless you have the font installed locally on your system, it won't look the same. You can use the image for sharing which will look the same regardless.