Answer:
Poor language skills can lead to a mental (expressive) block.
Step-by-step explanation:
The expressive block is one of the types of mental block. It is mostly shown when we want to communicate and express ourselves, but we are unable to do it because we are not equipped with the necessary knowledge or skill. The expressive block reflects, for instance, when someone has stage fright, that person is able to create a speech, but they have a problem when they need to present it, or, like mentioned in the task, when someone has poor language skill in let`s say some other language than native and that causes them to have a block when talking to a native speaker of that other language.