The easiest way to decode them is reading the anime opening and end credits, where the names of the staff are laid over the corresponding Orth runes. Since each symbol is a match for a kana sign, they can be decoded with a moderate knowledge of Japanese. As a result, people decoded them independently; the result could be found on the Internet. Manga readers faced the problem earlier and thus found the solution first. There are some differences in style but overall it is possible to read both manga and anime texts.
Written text is mostly used for illustrative purposes to create a mysterious look, but does not bring any significant new information. In the table above, the translation from Orth runes to katakana is presented, and below there are some examples of translated text.
All runes are strictly linked to the Japanese language.
Examples from the Anime
The first appearance of runes in the anime: Episode 1 (9m 44s); book cover
1. Kaminoke: Hair
2.Moemasen: doesn't burn
Katai hada: hard skin
3. Kohi chotto gakai: Like coffee (skin)
4. Teheso: belly button
Chinchin: childish term for penis
5. Chotto kawatta beruto: Strange belt
6. Herumetto: Helmet
kawaii: cute or tiny (in relation to chinchin in 4.)
7. Saiten: Markings
8. Nande chinchin ga tsuiterun tarou: Why is there a penis attached? (why does he have a penis?)
9. Teshi tsuna suru: End of notes
In the anime series, titles of books are copied and there are only few original titles. One text is copied from a poster in episode 1 and used later in episodes 7 and 13. Ibetsukaishi: Another beginning
Page of the book ep.13 9m 05s. ka e ra zu no mi ya ko na so "Capital of the Unreturned"
Cover of the same book (ep.13 5m 04s). Larger letters: "Exploration notes of the Abyss"
An example of handwriting from the third movie (5m 35s)
The lamps indicating life signals appear in the manga, anime, and in the second movie when Bondrewd notices Mitty's lamp has gone out. When transcript with English equivalent letters most of these names are: Isuke, Iroso, Pueru, Temuu, Hinika, Sumiko, Toran, Jitowa, Temu, Petora, Maruka, Kinshii, Kebihi, Shiyaroko, Susumu, Toimu, Shipube, Emupo, Iroso, Iitan. Some of these names are repeated multiple times.
Examples from the Manga