Are there any dev builds available somewhere, or is there a way for me to build it myself?
I'm really not sure what system you use to build it.

I just build one, but your changes isn't in it. I can build new one for you. Or you can do it by self. I'm using nothing special - just default tools which provided by forge. But you will need to get "thaumcraft", "sophisticated_wolves", "mariculture" and "baubles" API too.

Actually, I don't use the translation myself, but my players would certainly do... I was most interested in the changes added in 917e4b0 which I believe are not in the latest release.

So yes, if you can build it for me, it would be very appreciated :)

You can get Latest build from forum and replace old file(GraveStone 2.8.5.jar\assets\gravestone\lang\fr_FR.lang) by new one.

I'll do that, thank you for your time and your work!