Learning Chinese, Turkish, Russian and Arabic is intense.
And today I haven’t had time at all, until after dinner. So I decided to make this fortnight streak for those 4 difficult languages a 15 day streak.
So the correct solutions were:
Мой младший брат совсем не говорит.
Мы говорим и по-немецки, и по-русски.
I just kept writing и instead of й and I wrote ч instead of ц.

At least I managed to reach my daily goal, even after a long day. I think it’s better to do at least a bit each day than to let your goals go after a while.