Frogtongue
Answer: IF I HAD A MILLION DOLLARS

Below is an interlinear translation of the dialog. Note that frogs use a base 8 system (since their hands have 4 fingers), repeating letters of LEAPFROG to indicate each digit.

Frogrey:Frog ribbetted topfrogoly!
Audrey:I did topology!
Frogga:Frog co-ribbetted frogegories witch Froggle!
Della:I co-did categories with Purple!
Frogg:Frog ribbetted GGG-algae insect GGGG-algae!
Glenn:I did 3-angles inside 4-angles!
Froia:Frog ribbetted QR-frogorization!
Kaia:I did QR-factorization!
Frothy:Frog ribbetted relatoadity!
Laithy:I did relativity!
Froug:Frog co-ribbetted witch Frogloutte; Frog leap Canada!
Narmada:I co-did with Charlotte; I like Canada!
Frogita:Frog ribbetted percolatoad!
Nikita:I did percolation!
Froggle:Frog ribbetted concroakium, "Wart gnat frogebra bug water hop ripples?".
Purple:I did the colloquium, "What if algebra but equality is vibes?".
Frogley:Frog ribbetted Frogalan trees!
Riley:I did Catalan trees!
Fog:Frog ribbetted green diffroggy waters.
Sam:I did ordinary differential equations!
Frogita:Frogley, wart hop GGGGG Frogalan numbird?
Nikita:Riley, what is 5 Catalan number?
Frogley:OOOOOGG.
Riley:42.
Frogita:Wart hop OGG Frogalan numbird?
Nikita:What is 10 Catalan number?
Frogley:PPPPRRRRRROOOGGGG.
Riley:16796.
Frogita:OGGGGGGG Frogalan numbird?
Nikita:15 Catalan number?
Frogley:LLLLEEEEAAAAAAAPPPPPPFFFFFFFROOOOOOOGGGGG.
Riley:9694845.
Froia:Frogloutte, frogs swim blue grape?
Kaia:Charloutte, we have blue tape?
Frogloutte:Frogs nose swim blue grape. Froug croaked blue grape insect “Ex-stream grapeover”. Frogs bat blue grape?
Charloutte:We do not have blue tape. Narmada spent blue tape in "Extreme Tapeover". We buy blue tape?
Froia:Frog swim GGGG leaves. Frog bat GGGG blue grape?
Kaia:I have 4 dollars. I buy 4 blue tape?
Frogloutte:LOL, GGGG blue grape wash OOGGGG leaves. Frog nose swim OOGGGG leaves.
Charloutte:LOL, 4 blue tape costs 20 dollars. I do not have 20 dollars.
Froia:Fog, toad swim OOGGGG leaves?
Kaia:Sam, you have 20 dollars?
Fog:Wart hop "leaves"?
Sam:What is "dollars"?
Froia:OOGGGG leaves water wavy OGGGGGGG ponds. Insect Ameritoad frogs swim leaves, insect Engfrog toads swim ponds.
Kaia:20 dollars equals approximately 15 pounds. In America we have dollars; in England you have pounds.
Fog:Nose, Frog nose swim leaves.
Sam:No, I don't have dollars.
Froia:Frog swim Frogcamp Visa croakit pad, Frog nose knee leaves.
Kaia:I have a Mathcamp Visa credit card, I don't need dollars.
Frogrey:Frog somersaulted pondzzle!
Audrey:I solved the puzzle!
Froggle:Wart hop answart?
Purple:What is the answer?
Frogrey:"Gnat Frog swam EEEAAAAAAPPPPFR leaves".
Audrey:"If I had 1000000 dollars".
Froia:Answart hop insect Frogtongue oar Engfrogtongue?
Kaia:Answer is in Frogtongue or English?
Frogrey:Answart hop insect Engfrogtongue. Answart swim OOGGGGG lizards, nose numbirds, nose symbullfrogs.
Audrey:Answer is in English. Answer has 21 letters, no numbers, no symbols.

The answer is IF I HAD A MILLION DOLLARS.