The surviving objects
Rongorongo is preserved on a small body of Rapa Nui wooden objects and related witnesses. The Australian Museum describes lines arranged in reverse boustrophedon: adjacent lines alternate direction and the glyphs are rotated 180 degrees, so the object is turned for the next line. This differs from early Greek boustrophedon, where letters may be mirrored as line direction changes. Similar names for the paths do not establish a shared history or a shared writing principle.
An object record must say whether the item is original or a copy. The British Museum’s Oc1981,Q.1642 entry is a plaster cast of a tablet. It can document a visible sequence on the cast, but material claims about the original wood need an original witness or reliable documentation of it.
What is and is not known
The traversal of lines is a question that can be studied from physical arrangement. The values and linguistic interpretation of the glyphs remain largely unresolved in scholarship; the Australian Museum also records Rapa Nui oral knowledge about the tablets and their uses. A confidently phrased continuous sign-by-sign translation would exceed the published decipherment evidence. Counts of repeated shapes, line order and object dimensions are legitimate observations. A proposed reading must be labelled as a hypothesis and tested on more than one object.
The lesson is methodological. Layout can be more secure than phonetic value, and sign identity can be more secure than word division. State each level of confidence separately. Do not fill a gap in knowledge with a memorable but unsupported English sentence.
Worked limit
Suppose a photograph shows two consecutive rows with the second row inverted. It supports a proposed turn in the reading path under the documented rongorongo convention. It does not tell you what the first glyph means. Write two notes: “row orientation supports turning the object” and “sign value undetermined.” Both are useful findings, and neither requires a fabricated translation.
Modern-language examples on this page clarify a linguistic pattern. They do not establish unattested sounds or forms for an ancient language. Follow the cited sources below and keep editorial readings separate from the surviving trace.