I'm a native german speaker and my girlfriend is a native french speaker. Right now, she is using Duolingo to learn german.
She is very motivated and often spends several hours trying to do as many lessions as she can. Even after 4 hours of learning, she tells me that she believes she didn't do nearly enough.
I'm trying to convince her that she is actually going too fast and that her brain needs time to actually process the information. She however seems to interpret this as "being lazy" or me not wanting her to learn.
Is there anything I can do to help her without demotivating her?