I need help translating some text my Grandmother found. Long story short my Grandmother lives in a 13th century house in the French countryside It is a care home, built and rebuilt times beyond counting. However, the tunnels and basement beneath the keep were relatively untouched due to a possibility of high levels of lead. Regardless, the basement or larder, or whatever it's called is now safe, apparently.

My mother and grandmother were exploring the estate and were allowed into the Basement (now storage), when my Grandmother, (despite being blind in one eye) found some message/text engraved onto a wall next to a worn picture of a shield. The shield has a cross on it, maybe English, maybe a holy symbol. Either way, they want the text translated, I can't fucking do it nor can they or anyone there. I don't even know what fucking language it is. I don't like history anyway, and don't particularly give a shite, to be honest.

tl:dr can anyone translate this shit please.

"Miles militis Templum instituo Arcus sententia is eram damged ultra agnitio meus senior. Illic thy instituo locus of Mica. In ecfigies of records is est said quod super ut Valde quod ut sands of pharaones they left. Unde six men did non reverto. Admiralquod Sire Damocles duodeviginti puto Insula of Oak habitum key vero a trinus ut atrum silva pro iam est impossible quod Suus Maiestas has prohibeo men ex moving

Vexillum suus traba ex eruptio quod ligatio sui senior Jory

Si vos reperio is nuntius precor dico mihi quis efficio tunc ut teneo non Reperio mihi procul Tabellae tumulosus ero per ceterus of Ordo of nonus Nos mos caput capitis occasus ut Romano tunc month." Last Non ut sub Romano

Atla depressas tua Key abscondit

May vos ingredior in suus steps