Free/Cheaper english schools in Ljubljana?

Hello, my name is Pierre and I currently live in Ireland.
We are looking to relocate in Ljubljana but we have one last big problem.
The price of international schools!
They seem to range from Protected content Protected content a year.
We only want our daughter to keep getting in school in English language so she doesn't lose her English.

Is there a solution to that?
Isn't there a free school in English?

This issue compromise our plan to relocate :(

Thank you.
Pierre