Most people already speak English. However, there might still be room for improvement to move from speaking and understanding, to really being fluent and able to understand metaphors and expressions.
In our school we offer private English training for those who would like to work on their own focus points and in-company trainings for employees who would like to find the right tone in their emails, meetings and presentations.
We also offer a short conversation course for advanced English speakers who would like to become even more fluent and comfortable.