Applying to Language school, but it asks if I’m medicated and have ADHD, should I lie?

So I am diagnosed with ADHD and am currently taking medication for it. The declaration of health lists ADHD as a mental disorder, I will also need to add my medication.

This might sound stupid or dumb, but would I be rejected or will it be harder for me to be accepted if I say I do? Should I just…say I don't and keep myself medicated on the downlow?