From ActuallyAutistic Wiki
Echolalia is the repeating of words or sounds heard. This can be immediate or delayed. An example of immediate echolalia could be meowing back at a cat. Delayed echolalia can be part of scripting, or for fun.
Immediate echolalia is repeating a sound, word, or phrase right after hearing it. It could be anything from a single word to a whole sentence. Some people even translate what they hear into another language.
More detail please!
Echolagia is when you repeat what you heard internally, rather than out loud.