YOU SAID:

You must be good with your tongue to speak German.

INTO JAPANESE

ドイツ語を話すのは舌が上手だ。

BACK INTO ENGLISH

He speaks German well on his tongue.

INTO JAPANESE

彼はドイツ語を上手に話す。

BACK INTO ENGLISH

He speaks German well.

INTO JAPANESE

彼はドイツ語を上手に話す。

BACK INTO ENGLISH

He speaks German well.