Harmonic Syllables nick generator and checker (for Minecraft)
The checker isn't really a checker because it's based on Mojang's API, which isn't that good because it flags illegal nicks as available soooo...

• Portable
• Proxyless
• Fast
• Customizable

• Proxy system (rate limit is high but it's still better to use proxies)
• Regex Support (creating custom nick patterns)

in general, it doesnt exists, I've invented this term, but the meaning is:
When a word is harmonic, it's easily pronunciable, the main thing of this is vowels and consonants, which makes the word have a pseudo-meaning. The words may not really combine, but it's "readable".

Examples:
Coir, Kyle, Sine, Keep are harmonic, they use Cvcv and Cvvc (also Cccv but it's too specific)

Qhil, Wzec, Czkg, Ylxq are NOT harmonic, some syllables doesn't combines at all

One of the rules of harmonic syllables is "continuable letters", e.g: H, h is a letter that if not on the start/end of the word can be extended, like:
Shop: SHO -> ccv | h can be extended with any vowel
Lying: LY -> cc | l can be extended with some consonants and with any vowel, the reason of this is our tongue, our tongue accepts soft word combinations, which makes our brain think that the word is "common"

and many more combinations, its too complex to explain the lore for it but I think you got it!