@frandex
I'd also like to welcome you to the group!
I'm so sorry to hear your daughter is having seizures every day. It's actually common for speech to be affected during focal seizures. With auras (focal aware seizures), speech typically returns right after the seizure ends, while with complex partial seizures (focal impaired awareness seizures), it can take a bit longer to fully regain full speech.
You asked if your daughter can be cured of epilepsy. Since she's still a child, there's a real chance that the ketogenic diet could help control or even resolve her epilepsy, especially if it's treatment-resistant. There's a wonderful movie about this starring Meryl Streep – it's based on a true story of a mother fighting to help her young son with severe epilepsy. The film really brings awareness to the ketogenic diet as a legitimate treatment option, particularly for children with intractable epilepsy. Here are the details, in case it interests you:
Movie: "First, do no Harm"

I'd also highly recommend looking into the Charlie Foundation. It was created by Jim Abrahams (a Hollywood director and producer) after the ketogenic diet successfully controlled his son Charlie's epilepsy. He's actually the one who produced "First Do No Harm" to bring this treatment option into public awareness.
Charlie Foundation
https://charliefoundation.org/
Does your daughter's speech return immediately after her seizures, or does it take a while for her to regain full speech?
If I understand correctly, your daughter was diagnosed with temporal lobe epilepsy with mesial sclerosis – is that right? Has she been seeing a neurologist, and how have her seizures been treated so far? Is she currently on any anti-seizure medications (AEDs)?
Chris