I have been a language teacher for more than 8 years and I know exactly what learners go through to start speaking some of the English they have been taught for several weeks. The truth is that languages differ, their grammar, syntax, phonology, and linguistics are not the same. There are some languages that are said to be easy to learn and others are hard to grasp. Below is an infographic that classifies languages according to the degree of their difficulty. If you liked it make sure you share it with your colleagues and students.
Via: Voxy Blog