The document describes a bilingual TMX editor that allows users to view and edit translation memory files (TMX files) for two languages. It provides functionality for opening, editing, and saving TMX files, as well as converting files between different character encodings and checking languages within TMX files. The editor manages TMX files using a project system, allowing users to organize files into lists of those that have been checked (DONE) and those still to be checked (TBD).