As a bit of background: I've native level in English and French, I can understand day to day discussions in German and Spanish and I'm able to understand what's going on in a conversations in Italian, but without the details. In rank of understanding, I'd say: English/French, Spanish, German, Italian
For some reason, the least I am comfortable with a language, the easier it is for me to understand female voices. For some reason, the higher pitch seems more clear to me.
Is this something common? and, if so, is there any known reason for this?