>>55131963
>mb dndam qzt dwuneusxy zx eshbxohnec
OP

>jvsiqw grq otmdqmp yw sntlcmdpw, vhq jg fgvw
is

>'vbwnqael' ms ys uxihoa
a

>qbtd hwzktheoq rx cpcvkit.
fag.

I wrote some code that encodes messages in the same way as OP, but I can't figure out how to decode it.

function empty (n) {
  return Array.apply(null, Array(n));
}

function rand_word () {
  let n, str = "";
  if (Math.random() < .4) {
    n = 2 + Math.random() * 2;
  } else {
    n = 4 + Math.random() * 8;
  }
  return String
    .fromCharCode
    .apply(null,
      empty(Math.floor(n))
      .map((_) =>
        Math.floor(Math.random() * 27) + 96));
}

function encode () {
  return empty(20)
    .map((_) =>
      (Math.random() < 0.01) ?
        ("'" + rand_word() + "'") :
        rand_word())
    .join(" ");
}

>>55132233

Similar but not the same.

To give it a hint, i would describe my output as if fibonnacci met caesar.