This most peculiar script is written from right to left, and seems to mix up runes, straight and rounded characters in the style of Old Hungarian – but it defies all attempts at translation. This bamboozling manuscript was given to the Hungarian Academy of Sciences by Count Battyany in 1852, and is is believed to have been written in medieval times. Appearing to be hand-scripted, and illustrated with crude black and white sketches, the writing is simply not decipherable in any way. However, code-breakers have managed to at least ascertain that the language involved consists of 42 letters and over 200 different symbols, some non-alphabetic, as well as other symbols which see only occasional use.
The Rohonc Codex is just one of seven untranslated manuscripts in this list at Environmental Graffiti. Link -via the Presurfer