I wasn't thinking about villains, only a "Oh, look, someone let a lot of vowels here ! Let's take them !" ^^
I can give you the only word I know without any vowel : crwth. (Welsh playing music, somewhere ?)
Cwrw is also Welsh, it's the word for beer.
Both of your choices of random Welsh words to know somehow surprise me not at all
![Tongue :P](https://ssssforum.com/Smileys/default/tongue.svg)
(although "crwth" is so hardly used I had to google it to be sure of the meaning - extra points for obscurity go to Mélusine ^_^)
(Also, same thing as Rollo said, we've actually got way more vowels than English as we consider both y and w to be vowels as well. Can't say much about Czech seeing as I know next to nothing about it, but it looks like it would be great fun to try out
![Tongue :P](https://ssssforum.com/Smileys/default/tongue.svg)
My imagination is currently setting it up as something like Dwarvish actually
![Tongue :P](https://ssssforum.com/Smileys/default/tongue.svg)
)