ドイツ語も話せる

can also speak German

→ ドイツ語
phrase Rare #41,349
can also speak German も means “also” and suggests the person can speak another language as well.
JA: トムは英語の他にドイツ語も話せる。
EN: Tom can speak German in addition to English.

彼は英語ばかりでなくドイツ語も話せる。

He can speak not only English but also German.

彼は英語とフランス語は言うまでもなく、ドイツ語も話せる。

He can speak German, not to mention English and French.

トムは英語の他にドイツ語も話せる。

Tom can speak German as well as English.

英語は言うまでもなく、彼はドイツ語も話せる。

Needless to say, he can also speak German.