What level of English is required

The course requires a minimum level of English proficiency B1. No previous experience or qualifications are required.

Each student is personally responsible for the level of their knowledge. Having a level lower than B1 will make it difficult for you to complete the course and continue to work.

Test to determine the level of English

https://tefl-tesol-certification.com/test

If the test result is above 48%, then the passage of the TEFL / TESOL course will not be difficult for you.
If your result is below 48%, this does not mean that you will not be able to take the course, it means that you will need to make an effort to understand the material.
Also, we always advise you to take the test at least twice, because the first time you test - you never know what to expect, something could distract you or the question was misunderstood. So don't jump to conclusions.
If you are unhappy with your result, take the test again.
And also remember that each package includes

CLIL - Content and Language Integrated Learning is quite often used to describe a method of teaching a subject with the help of a foreign language, the main purpose of which is to study the subject and improve language skills in a foreign language.

so that during the course you will be able to improve your level of English.