I don't think the pronoun problems are on purpose. I get the impression the Dev uses a mostly machine translation, and with spanish having both masculine and feminine words regardless of the speaker or the subject, the pronouns probably get translated automatically.
My only real complaint about the content of the game is the complete lack of interaction with the wife, including her not getting even a name. That's not what the game's cover art implies. It looks like you should be able to seduce the wife as well, but it's never even approached.