while playing goblet grotto, swampy will be honking their thoughts at you through glyphs popping up at the top of the screen. most players think they seem pretty incomprehensible and useless, and theyre partially right. most of the glyphs consist of stuff that, as far as ive seen, arent an actual gameplay mechanic (such as "i am searching for boots of achilles", "haunted lake", "treated by false doctor", etc.) BUT, there are some exceptions! the glyphs can be very useful to know when swampy is dying and how to help them, for example if they start crawling and you see the glyphs "i have starved to death", "death death death death death death", "i'm hungry", "i'm starving", etc, you know that you should feed swampy. the glyphs that include "dario" are possibly useful too! i got this information from @pillgrimm in the comment section of vinesauce vinny's GG video, so i'm not 100% sure if this is actually true, but whenever the glyphs start mentioning dario it apparently means that your file has been corrupted. very ominous
also, very sorry "got boots of achilles" isn't working! again though, boots of achilles most likely aren't a real thing in the game so dont worry you arent missing important gameplay!!!
there are also, The Secret Glyphs
the first 23 glyphs are normal simple words swampy will say anywhere throughout the game, what makes them secret is that they don't appear in the glyph dictionary and you'll have to look into the files of the game to find out what they mean. as for the complex sentences, they cannot be found anywhere and i had to ask thecatamites what they mean, "The frog face besides two glyphs means something like "(exclaiming)"...". these glyphs only appear once you've made swampy pray several times, to the point where their mental health declines.
one little site i enjoy is frog fortune! its just a silly site that randomly generates some glyphs.