Open competitions
Yes, you can modify your languages even after submitting your application for an open competition, as long as the application deadline has not passed. Once the deadline has passed, the application form including your choice of languages can no longer be modified.
If you edit your application after submitting it, don’t forget to click “Submit” again. Otherwise, your application will remain in draft status and will not be taken into consideration.
See also: How do I choose the languages of the tests for a competition?
Contract staff selection procedures
You cannot change your language options yourself.
Instead, you will need to submit a request to EPSO via the contact form.
Please note that the language requirements are defined in section 3.2 of the Call for Expressions of Interest.
See also: How do I choose the languages of the tests for a contract staff selection procedure?