right now I have no idea what the plugin is supposed to be doing (I haven't downloaded it and it doesn't become clear from reading this thread).
The plugin is aimed towards assisting with validation of the game text and speech. It's only an editor plugin, not a game plugin.
It has the ability to scan the scripts (dialogs, global scripts and room scripts), and display all the speech line it finds in those scripts (such as the text used in the character Say function). You can double click the line to go directly to the corresponding script line.
You can sort, filter and search through the lines using the interface.
If the lines are numbered then it offers additional functionality:
The Speech directory is scanned for each line and provides info on the file status. You can playback the speech from the editor itself. You can also mark whether those lines are correct (there are 2 checkboxes for each line, one for the voice file and the other text).
To make sure the plugin is non-intrusive as possible, it only loads the data if you click on the refresh button, thus it should not affect something you do, unless you are actually doing something at the plugin screen. It should also have the capacity to handle thousands of lines, which should cover even text-heavy games.
Here are 2 screenshots I provided in a previous thread, which would hopefully make my explanation clearer, and if there are additional questions I'll be happy to answer them.