I know it's probably a far stretch but I'll take my chances :) I make constructed languages or "conlangs" and I am willing to teach one of my many Italic languages if any of you so wish.
I have two friends who learn one (both are learning different languages) and both have told me that it has helped them with their Spanish and with understanding Latin roots in English and just Latin in general.
Please respond if interested. If not then that is fine I completely understand. :)
Your title contains a most interesting oxymoron. Never have I ever seen Latin referred to as a conlang before. ;P
Jokes aside, both of these languages are already available on Duolingo, so I'm not entirely sure what the benefit would be of studying a conlang just to help someone learn these two. I mean, it'd be a great study aid, but it seems a bit like overkill, using a conlang to learn concepts that can be learned just as easily without it. You see what I'm saying? :)
It's cool that you're making conlangs - I should probably get back to mine. :P Keep up the great work!
Volgav vitsenanieff nivya kevach varatsach.