Is context really important when learning a foreign language?

Context is really important when learning a foreign language (of course grammar and vocabulary are more important for language application). When learning a foreign language, especially when it reaches a good level, we can consider creating a good context.

Creating a good context includes finding an expert who can speak a foreign language in the field you want to engage in. You can ask him to comment and improve your answers and master the main knowledge points and job requirements in this field expressed in a foreign language.