I still don't get it. Here's the opening of the "Vortiger's Tower" section of the Prose Merlin, chapter 2 according to the METS table of contents:

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Thus they rode in one company, all four, till on a day that they passed through a field beside a town wherein were great plenty of children that therein were playing. And Merlin, that knew well that these four came to inquire after him, drew him toward one of the richest of the company, for that he knew him most cruel and hasty. He seized his staff and gave this child a great buffet. And anon, this other began to cry and weep and to mis-say ["revile"] Merlin, and reproved him with a loud voice, and called him misbegotten wretch and fatherless. When these messengers heard this, they came toward the child that was weeping and asked him which was he that had smitten him. And he them answered, "It is the son of a woman which never knew who him begat, no never man could tell of his father."

And when Merlin heard this, he came against ["towards"] them laughing and said "I am he that ye seek, and he that ye be sworn ye should slay, and bring my blood to King Vortiger." And [when] they heard him thus say, they were sore a-marveled and asked him, "Who hath told thee this?" Quoth he, "I knew it ere ye were sworn." Quoth they, "Then must thou come with us." "Nay," quoth he, "I doubt that ye will me slay."

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I've made two types of changes here:

1. Words are given their modern spelling.

2. Words that are given glosses may be replaced ("wiste" -> "knew") or annotated ('against ["towards"]') with those glosses.

Doing a translation on top of that is pointless; this is already perfectly intelligible to a modern speaker. What would you gain by having a translation on the facing page?