How can you improve your level of English?

Is it enough to have a very basic notions of the Shakespearean language?

If we listen to most companies, the answer is no. In fact, many Spaniards are completely unable to carry on a complete conversation in English and to express themselves naturally. This is something that is especially noticeable in job interviews, where those responsible often use English in some question to see how the candidates defend themselves and if they have a good oral expression.
Travel can also help you give your spoken English a good boost.
To make a difference, it is essential that you do not stick to a basic or intermediate level and that you are able to demonstrate impeccable understanding and excellent expression.

To improve your level of English , you can use:

Travel to Anglo-Saxon countries,
hire a private English teacher,
review with English websites,
practice on a day-to-day basis,
contact English speakers,
use mobile apps for learning English,
sign up for a business English course in order to acquire a good record that allows you to function in a professional environment. The last touch so that your English is totally chameleonic.
You must remember that learning the language of Shakespeare falls on both the oral and written dimensions : good pronunciation can fall apart with bad writing and vice versa.
In order to improve your level and master English perfectly, you must improve all your language skills. With a good level of English, you will be able to get a job abroad, which will add value to your CV.