Honestly, since you asked, ..all this/your agenda including a big announcement of a "vow of silence", efforts to "appreciating the ability to speak", "an attempt to gain control of my emotions" or over whatever, Jesus Christ's opinion about "your talking and thinking", your "desire to emulate him", "represent him", awaken to whatever and getting away from vulgarity that way, ..to me this sounds like business as usual, more of the same, more egoic bullshit. I think it will make no difference if you do all this while your mouth is flapping, or shut. But I would encourage you to do/try it anyway, cause as soon as the food hole is closes for a while, the mind will ramp up the volume of its chatter inside and there is greater possibility to learn something about that, I think.
Unless you are on a retreat somewhere, meaning in an supportive/enabling environment as other have pointed out, this will not work out since modern life demands at least some verbal communication.
Would I take a vow of silence (for a year) in "normal" life? No, I think that's just silliness and won't work out. I will probably get locked away. But words are not the ultimate concern, from "where" they come is. That will naturally determine how much and what words flow out, if one wants/likes it or not.
Would I go on a silent retreat (for a year)? Perhaps yes, it depends. It would certainly represent a unique opportunity. I was in silent solitude for weeks more than once; very ..'revealing', let's phrase it like that. But I also know that one can be still inside, even though words are spoken on occasion. And people react very diverse to this, I found, but that's not really what it is about, is it? Anyway..