| euskara | eus-000 |
| aitzinsolas | |
| Deutsch | deu-000 | Prolog |
| English | eng-000 | foreword |
| English | eng-000 | preface |
| English | eng-000 | prolog |
| English | eng-000 | prologue |
| Esperanto | epo-000 | prologo |
| euskara | eus-000 | hitzaurre |
| euskara | eus-000 | sarrera |
| interlingua | ina-000 | prologo |
| polski | pol-000 | prolog |
| español | spa-000 | prólogo |