Gallows Island

[ReneZ]

Thanks!  As for the "inside" part, I must have confused Thai with the You are not allowed to view links. Register or Login to view., in which some vowel sign are written around or bracketing the consonant.

No, that also happens in Thai. It would have made my answer quite a bit longer.
The (prefixed) vowel  เ  is also part of several such combinations, which makes it appear very frequently at the start of words. In dictionaries, sorting is primarily based on consonants, so words starting with เ appear  throughout the dictionary.
 
You will also find ไ  ใ and โ at word starts. Note: these are not gallows ;-)  
ะ belongs at word ends, but altogether this is far from enough to build a word structure like Voynichese.