Whether you do or do not get the chance to learn a new style, depends on how well you hold your own. Let's start with the basic changes: You can learn new styles from the enemies who use them.
This mod has gone beyond a few minor changes here and there. In fact, it's many times larger than all other mods combined.
I can say without the slightest bit of exaggeration that this is the largest mod for Jade Empire. Pretty much every style Jade Empire knows is available to the player now. While I made those other mods play nice with each other, I figured out a lot about the game myself and eventually this became a mod in its own right. And so 'Jade Empire in Style' started out as my personal compilation of these other mods.
There are a number of mods out there, that attempt to change that by making more styles available. Partly because you cannot acquire most of the game's combat styles and partly because you can only level a fraction of the styles you do acquire. In vanilla Jade Empire you are rather limited in your combat options. The mod is available in an English and a German version.
This is a mod for the game Jade Empire that offers over 20 new styles to players, changes the rules to give the game more variety and adds numerous techniques, gems and other goodies.