Germany makes an exemption for those people [0]:
> The requirements [to possess sufficient knowledge of the German language] shall be waived if the foreigner is unable to fulfill them due to a physical, mental, or psychological illness or disability, or due to age.
[0] https://www.gesetze-im-internet.de/stag/__10.html
> The requirements [to possess sufficient knowledge of the German language] shall be waived if the foreigner is unable to fulfill them due to a physical, mental, or psychological illness or disability, or due to age.
[0] https://www.gesetze-im-internet.de/stag/__10.html