Why can't classic Sonic speak?

What Sonic Means Today - IGN

The Beginner's Guide to Classic Sonic Lore – Source Gaming

How Sonic the Hedgehog Explains the Internet

Why is this gens classic sonic model so hated? He looks nearly identical to the artwork from the original games, aside from having a slightly brighter colour. : r/SonicTheHedgehog

Sonic Origins' revamps four classic Sonic the Hedgehog platformers

5 Classic Sonic Characters Sonic The Hedgehog 2 Needs To Introduce

If you could add more people to Team Classic Sonic, who would they be and why? - Quora

Best Sonic games ranked: every Sonic the Hedgehog game ranked from best to worst - Video Games on Sports Illustrated

Sonic Mania and its impact on the future of the Sonic series