presently there seems to be a bit under 400 results with most French diacritics, not all. (œ’s missing a lot, some results appear without actually having accents). i hope you get to add some more ^^
I've updated Sleight Of Font to include the characters you need for French (I think) and most other European languages + added a few punctuation marks including emdash. You can download the updated version from our fontspace here: https://www.fontspace.com/sleight-of-font-f24673
And I'll include it in the next update of the All Fonts Pack too.