You have a unique language as a rider. A unique way that you do things when you are with your horse, both on the ground and in the saddle. In fact, every single other rider in the world also has their own unique language. Which is great; special snowflakes and all that.
The trouble starts when your horse learns someone’s unique language; someone other than you…
Once a horse has learned to do something or to associate a specific action with a specific response, it requires consistent diligent attention from the rider to retrain the horse. Retrain the horse to their way of doing things. And this is important. Failing to retrain your horse will result in mixed results, frustration, and eventual resentment for both horse and rider.
You have your own unique way of doing things. It is not your horse's fault when he does not understand your unique way. It is your responsibility to teach him how to understand your unique way.