私は基本的に有言不実行な人間なので、「なるべく日本語を話さない」という

私は基本的に有言不実行な人間なので、「なるべく日本語を話さない」というのを守れる保証はありません。

結果 (英語) 1:

I am a human being basically Yes words non-execution, there is no guarantee that protect the because "as much as possible do not speak Japanese."

結果 (英語) 2:

Since I am basically a non-speech person, there is no guarantee that I can protect myself from speaking Japanese as much as possible.

結果 (英語) 3:

Since I am basically a human being unavoidable, there is no guarantee that I can not protect "not to speak Japanese".