Yes, except that WeiDU never removes strings from the .tlk. The only way they get removed is through player intervention--installing a .tlk overwriting product such as the patch or some .tlk-overwriting mod, or reinstalling the game.
Erm - I wonder how the Tactics (the Ilyich part) gets mixed up with the Aerie/Anomen flirt pack lines routinely in fresh installations of Tactics, Ascension (Weidu version) and flirt pack. I have seen it happen plenty of times. May be a bug in the flirt pack mod, I fear, since I have no problems when the Flirt pack is not installed.