Firstly, do not even consider yout mother tongue to be a hindrance. If anything, your mother tongue will help you in learning. All over the world you will see that people who have education and 'thinking' in their mother tongue do well and are more creative, unlike in our country where we are good in copying english language and more recently accent.
To thos eof you who think you do not know enough english, put efforts into learning and do not feel bad for lack of english prowess. On the other hand, feel happy about having a good grasp of your mother tongue. MT will help you excel in your chosen field. It is also easy to sware in one's MT!
So, all teh best and keep working. Put some effort and do not reeplace your mother tongue with english, whatever you do!