Good Day Everyone! My name is Martha and I am from France. I finished a degree in Arts here in our country but I wanted to get more for my education. My plans involve getting a business course and I wanted to complete it in a school abroad. However, I am not confident enough with my english communication skills. Does the mastery of the language matters that much?

Different schools will have different requirements for the level of English they require. If you want to study in English, but your English is not great, then you might be better off looking for a programme that is aimed at people who are not native speakers.

Most top business schools on the European mainland will offer programmes taught in English, and they tend to have easier requirements. There are also programmes which aim to develop both business and English (For example https://www.st-andrews.ac.uk/media/elt/documents/CIFP%20PG%20prospectus.pdf )

For non-native English speakers, business schools will usually ask you to submit proof of your English ability during the MBA application process. This usually involves taking an English-language proficiency test (the TOEFL, IELTS, the Pearson Test, etc.)

Some will specify minimum scores (Cranfield wants a minimum IELTS score of 7.0, for instance), but other schools, like Columbia, won't tell you what they're looking for.

Mastery of the language indeed matters, since classroom discussions, groupwork, and other kinds of interactions are huge parts of the MBA experience, and if you're not able to participate at the same level of the others, you'd miss out and make it harder for everybody else.