Söylediği şeyin hiçbir önemi yok. - It doesn't matter what he said.
Söylediği şeyin hiçbir önemi yok.
It doesn't matter what he said.
Neye inandığımın önemi yok. - It doesn't matter what I believe.
Neye inandığımın önemi yok.
It doesn't matter what I believe.
I’m afraid I’ve broken your mug. — It doesn't matter; it was old and I was going to throw it away anyway.