It looks like you don't have the right dictionary.gd file in ...\S4PGameFolderRMAM097\files\scripts\ This has so far always been a sign of an installation problem.
If you open dictionary.gd, the last chunk of code should be as follows at the end of this reply (I skipped lines with ... in this copy/paste). If you don't find it, you've been doing something to overwrite it. It could be the backup applying itself too if you tried to reset or apply any mods from within the game. To be 100% sure you install cleanly, you need to unzip the main game file to it's own folder (no overwriting any existing game/folder) and install the AricsExpansion folder in the proper location, again without overwriting anything or changing the folder name. Please try a fresh install without applying any mods or doing anything aside from copy/pasting the folders; just follow the instructions and be careful not to take any additional steps and you should be fine. There's a 1st time for everything, though so please let me know if it doesn't work for you. Thanks!
var hybriddict = {
Imp = "$He looks like a very small demon except $he is oversexed and has unnaturally colored skin.\n\n",
Undine = "$He appears not too unlike a typical drow except $he has some distinctly aquatic physical features.\n\n",
Huldrekall = "$His appearance is twisted and ungainly compared to $his nymphly counterparts.\n\n",
...
Dog = "While similar generally to a Wolfkin, $his features are clearly more aligned with those of a domesticated dog.\n\n",
Werewolf = "$His limbs appear unnaturally long and at first glance some mistake $him for a monster.\n\n",
Werebear = "When observed $his resembalance to a Tanuki typically goes unnoticed due to $his alarmingly massive shaggy bulk.\n\n",
Mousekin = "$He looks entirely different than a Gnome in all but stature, with a small furry body, ears, and a thin mousy tail.\n\n",
}