[KyleGoetz]

AlanX, we know your Japanese is not good because you have repeatedly given a terrifically incorrect answer in this thread.

日本語を話します means "I will speak Japanese." You have to use the potential form 話せる there. And then, you should preferably use が. And end with the sentence-final particle か.

日本語が話せますか。

This is textbook Japanese. Yours should be clearly wrong to a second-semester student of Japanese.

In your parlance, /facepalm.