In any country or job, good communication skills are of utmost importance. Individuals from another country will at least try to understand you if your communication skills are good. No technical training or academic strength is going to get you anywhere if you are weak in communication skills. As a pilot, you need to have a good grip on team management and good team management is possible only if you know how to communicate with people properly. Nobody is going to coordinate with an aviator who does not know how to deal with his/her team.
All these aspects mentioned above cannot be acquired through textbook knowledge. Culture, language, and good communication skills are learned through consistent practice. It’s a slow process.
So these attributes that you learn during the course of your pilot training not just make you a better aviator but a better individual as well. Just keep learning to keep growing!