To be successful, you must keep moving and move forword with confidence. Now you are not a citizen of village, you are a global citizen. You must communicate whole over the world and move. For this communication and movement , you must need two things. One knowledge and two communication skill. I know, you have knowledge . You are a expert of a special thing. You want to tell your speciality over the world. So you must need communication skill and for your communication, you need a language. I also know, you know a language but I don't know which language are you speak to? However you need to know which language is use whole over the world? You must learn it. There is no alternative way for now.
