Translation of "Discern" in Japanese

And that was very frustrating at first, so difficult to discern.

‎最初は見分けがつかず ‎もどかしかった

It is hard to discern between the true and the false.

本物とにせ物を見分けるのは困難だ。

However, when listening to an unknown foreign language, our ability to discern different words is lost, and we recognize speech as being a stream of sounds without many pauses.

しかしながら、未知の外国語を聞くとき、我々は異なる単語を聞き分けることができず、発言をほとんど休止のない音の連続であると認識します。