"Fashions as in, words that lots of people use. There are sometimes, especially amongst young arcanists and students and whatnot, cliques that like using the same words, or sometimes the normal drift of word usage makes one form more common than the other."

"And that makes the less-used word work less? ...I wonder what happens if you make spells in Eivarne."

"It makes spells with it cost more and... I have no idea. It's actually spoken by people who happen to be in another universe. I could figure it out, though."

"Should I teach you some Eivarne?"

"I won't learn it nearly as fast or as well as you did."

"Well, you only need to learn enough of it to make a few spells in, right?"

"Right!"

"And if we want to learn as much from them as possible, they should probably be translations of spells from languages you already know..."

"I mostly don't keep any spells bound on me, actually, just do them on the fly. I have a couple bound to short gestures and words for emergencies, but might be easier to just try doing new spells in both languages a few times to smooth out normal noise in meanings."

"Hmm, okay. So maybe it'll take a while to teach you enough."

"Not necessarily. Come up with a few suggestions, I'll get single sentences for them, then you translate them, and we try?"

"Okay!"

"Could get... one for flight, one for telekinesis, one for telepathy, one for elementalism, one for invisibility?"

"Sure. What do you mean by 'one for elementalism', though?"

"Like, elementalists have this name because a very common blessing used to be control over the elements, so there are spells that grant that specific power for a while."

"Aha. All right. If you make up spells for that, I can translate them."

So she does! They're shorter and much less detailed than the minutes-long spells she's used before, and don't actually take effect when she says them because she's just, well, saying them.

Ruava asks a few clarifying questions about what this or that word or phrase means, and then provides translations into Eivarne of all the spells.

"I can also do other languages but Eivarne is the most widely spoken."

"Let's try Eivarne first."

She closes her eyes for a few seconds, then smiles. "Well, looks like it costs less? Only a little bit, but—how many speakers does it have?"

"A whole world's worth, but I don't know how many people there are in the world."

"I might actually want to learn it just to get even cheaper spells."

"I can do my best to teach you!"

"I'll probably want to cheat with telepathy, too—and we're getting close, we should probably become invisible—can you translate my paragraph-long invisibility spell?"

"Sure!"

She translates the paragraph-long invisibility spell.

And now they're invisible!

As they get closer, it also becomes clear that the eggs aren't silent. They're actually physically dragging themselves over the landscape, and this is, presumably, pretty noisy. They're slow, but very large.