We have verified that these creatures use language by the human definition of it. The months of hard work that we have put into the study of the Berry/Morehead tapes is finally coming to fruition. The analysis is finished, although I am still working on parts of the final write-up such as frequency count tables, morpheme lists, etc.
I believe that the study of these tapes will never (and should never) end. With the recognition and acceptance that these creatures do indeed speak and understand a complex language, a greater effort will be made to collect voice recordings and our analysis of the language will improve. Now that we have a precedent and techniques established for this study, this process will certainly become easier.