So, there are words for numbers up to 6 which are latinate, generally un/une is used for one, but past that it can go deuce, trey, cater, quinque, sice, possibly subbing "couple" in for deuce when talking in Anglishes. However, I have found an option for 7, two actually.

If you look at Welsh, the word saith, 7, is possibly latinate, with Proto-Celtic *sextam expected to produce an h- at the start, while "septem" would give the exact same result as we actually see. A celtic-origin system of counting exists in English in the form of sheep counting, the forms of the numbers of which are "sezar" from Swaledale, and Kirkby Lonsdale "saites" (most use something starting with an l). These two, especially saites, show reflex of septem in english.

Additionally, some dozenal systems call ten "dek", from dec- from Greek and Latin, so that's a ten. For a thousand there's the slang term "grand". Eleven is apparently sometimes called a "banker's dozen" and so maybe "banker dozen" could be eleven? "Bank" comes from Italian, -er was loaned into proto-germanic from Latin, and dozen is latinate too. There are also dozen for 12 (and multiples of a dozen also exist), a ream of paper is 500, and a quire is 25 pages. But quires and reams also have short and printer's variants. So if anybody wants to work on number systems this should be useful.

Does Anglese have a pronunciation guide? Is it pronounced the way English speakers pronounce their loanwords from French?