Changing converted text to full cursive or speedloops creates garbage letters.

Most normal fonts have 256 possible characters. Only 26 of these correspond to the lowercase letters from a to z. With text converted by the Helper Program, characters other than these 26 have been used to achieve fully cursive text. When this text is converted to another font, the characters displayed will not be the letters a to z.

For example, in the word “abracadabra” there are 4 different a‘s used. Only the first a corresponds to the lowercase a in normal fonts – because a letter’s shape is determined by the surrounding letters, the second, third, fourth and fifth a‘s would actually correspond to different characters in a normal font.

The web contains much information on font formats and character encoding.