@Nothapppy
My DC is considering taking a degree in Germany. Their school doesn't teach German, but DC has done some language exchanges to Germany (from zero German knowledge) and has had some online teaching, and on top of that would spend some time in Germany prior to taking a German language exam to entitle her to take a degree. German universities cost the same for international students as for EU students. And come with the benefit of Erasmus, which is important to my DC. Some courses (though not many) are taught in English, avoiding the language issue.
Brexit is crap - but why assume that all options are closed to our DCs when that isn't actually the case? Of course, things may change in the future.
Are you and your DC UK citizens and do you live in the UK?
If so, she will only be able to spend 90 days in 180 in Germany without a visa. This is enough to do a 12 week language course if you can afford the fees and living costs, or as PPs have noted, Workaway is a possibility.
As to taking a degree in Germany, your DC will need a student visa. To obtain one she will need to prove she has access to around €8,700 per year for living costs.
Then there's the tuition fees. At public universities, the fees are indeed currently the same for non-EU students - apart from in Baden-Wuerttemburg where tuition fees of €3,000 per year have been introduced for non-EU students.
Also, there's around 110 euros per month for the statutory public health insurance and then travel costs to and from Germany.
So there are options to study an entire degree in, say, Germany, but they are expensive. A bursary or scholarship would help, but I don't see many of those available at bachelor's degree level.