Can I just add real quick here that (even though this might just be developer oversight) The Minish Cap characters speak in The Wind Waker Hylian? If you were to take that as law, it would be clear that The Minish Cap comes AFTER The Wind Waker (or at least after Ocarina of Time, on the adult timeline, depending on when [in-game] the language was developed).
i dont think that is a solid reason for anything. you are obviously the toon link and the characters in the game are obviously closely resembling the characters from WW and PH, but thats just because thats how they felt like making the game. the language could have been overlooked, or over time, the creators just changed up the language for originality sake. none of the characters in TP look anything like those of the characters in OoT or MM, but we know (most of us do anyway) that it takes place after those games.
and just because they speak the same hylian as WW does not AT ALL mean that it comes after it, that could also mean it comes before it, which if MC is the first game in the timeline, would be before WW.
i believe MC to be the first in the timeline, which means it comes before OoT, then WW after that in the adult timeline. i cant recall anyone speaking hylian in OoT to compare to MC, so if they dont speak any hylian to compare, then it is plausible that WW got their Hylian from MC, because it was passed down and just never used in OoT.