the person who you speak to vs the person whom you speak

Some examples from the web:

• This is the way things work in a Parliament: the person who speaks last is often right.
• I think I know exactly the person of whom you speak.
• Who is this person who speaks to me as though I needed his advice?
• Faced with a 20% share of sales by a large country, and after knowing that person speaks the Hakata dialect, the person that's responsible for the VVIPA disappeared first thing this morning.
• Responsible for directing repression of persons who speak up in defence of their legitimate rights, including freedom of expression.
• He needs a person who can speak English.
• I want a person who can speak French.
• I am not the right person to speak to in this regard.
• Claire would be the best person to speak to about that.
• Is That How You Speak To The Person Who Just Paid Your Rent For A Year?
• But since this inquisition is in progress, be careful who you speak to.
• To spare your honor this task, I have chosen one person who can speak for them all.
• It's a great honor to hear you speak in person.
• Responsible for grave human rights violation of persons who speak up in defence of their legitimate rights, including freedom of expression.
• He is thus responsible for directing grave human rights violations in the repression of persons who speak up in defence of their legitimate rights, including freedom of expression.
• He is thus responsible for grave human rights violations in the repression of persons who speak out in defence of their legitimate rights, including freedom of expression.
• But Commander Tano is the only person the prisoner will speak to.
• Who is this person you speak of?
• And then one person speaks and then the other.
• It's like a person who wants to speak, but when he opens his mouth, the words are caught in the throat.

Some examples from the web:

• I think I know exactly the person of whom you speak.
• Faced with a 20% share of sales by a large country, and after knowing that person speaks the Hakata dialect, the person that's responsible for the VVIPA disappeared first thing this morning.
• This is the way things work in a Parliament: the person who speaks last is often right.
• It's a great honor to hear you speak in person.
• Who is this person you speak of?
• And then one person speaks and then the other.
• To hear a person speak of love?
• People say you were the last person to speak with jordan before she... died.
• You're the only other person that speaks English around here.
• Could be a case where head trauma causes a person to speak a foreign language.
• Now, we're all here because someone in the family is feeling like they're under a lot of stress, and I think that person should speak first.
• We didn't take over the school so a hearing person could speak for us.
• I am not the right person to speak to in this regard.
• Claire would be the best person to speak to about that.
• A person might speak the language of computers in the information society, but perhaps he has nothing else to say.
• Responsible for directing repression of persons who speak up in defence of their legitimate rights, including freedom of expression.
• Mr President, I am sorry that Mrs Siimes, who would be the right person to speak on this matter, is not here.
• He needs a person who can speak English.
• I want a person who can speak French.
• The typical Japanese person doesn't speak English.