I haven't heard anything on this matter, but I will ask 〇〇 about this.
I don't know anything about this, but I will speak to 〇〇.
ーI haven't heard anything on this matter, but I will ask 〇〇 about this.
「この件に関しては何も聞いていないのですが、〇〇に聞いておきます」
I haven't heard anything ...で「私は何も聞いていない」
matter で「事柄・件」
ーI don't know anything about this, but I will speak to 〇〇.
「このことについては何も知らないので、〇〇と話しておきます」
I don't know anything で「私は何も知らない」
to speak to ...で「…と話す」
ご参考まで！
カナダ 
