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 | |
| ı I | tr Turkish | |
| í Í | ca Catalan, cs Czech, cy Welsh, es Spanish, fo Faroese, ga Irish, gl Galician, hu Hungarian, is Icelandic, nl Dutch, no Norwegian, pt Portuguese, sk Slovak | |
| ì Ì | cy Welsh, gd Scottish Gaelic, it Italian, mt Maltese, nl Dutch, no Norwegian | |
| i İ | tr Turkish | |
| î Î | br Breton, cy Welsh, fr French, it Italian, nl Dutch, no Norwegian, ro Romanian, sq Albanian, tr Turkish | |
| ï Ï | ca Catalan, cy Welsh, es Spanish, fr French, gl Galician, nl Dutch | |
| ī Ī | lv Latvian | |
| į Į | lt Lithuanian | |