BONUS CONTENT Extended characters used in major European languages grouped by language and by the Latin letter they are based on. This content is associated with Chapter 3 of the book.
| Character | Languages | |
| ś Ś | pl Polish, wen Sorbian | |
| ŝ Ŝ | eo Esperanto | |
| š Š | cs Czech, et Estonian, fi Finnish, hr Croatian, lt Lithuanian, lv Latvian, sk Slovak, sl Slovenian, sr Serbian, wen Sorbian | |
| ş Ş | ro Romanian, tr Turkish | |
| ș | ro Romanian | |
| ß | de German | |