on 14,17,24 across: french proverb. 4,4,3,3,1,5
beware
There are hundreds of proverbs in French and this answer is in French.
Because a translation is asked for on 9,10 across of 4,2,2,3,3,4,6
Here are 2 answers
14,17,24 across: Honi soit qui mal y pense
9,10 across: Evil is to him who evil thinks
11 across Garter (The above is the motto for the Order of the Garter)