Geordie, Welsh, and Gaelic the true British accents all others are born from European and Londoners who had to use French & German to make up their dielect
Window in French - Fenetre
Window in Welsh - Fenestr
From what I remember from my school days in Wales, Fenestr ( window, latin fenstra) llyfir (book leber) and arian (silver or money latin argentum) were words that came from the Romans. Llong from the Viking long boats is a ship.
These were taught in Welsh lessons, I have subsequently found that Arian is from Proto-Indo-European *h₂erg- (“to shine”) and that unlike what we were taught in school,Perhaps borrowed from French, the Welsh word for window is ffenestr.
So, these are bits of fairly useless partially accurate information that I remember from those endless obligatory Welsh lessons in the 1960's! Google is your friend!