protolang

I have basically three phonological  naming languages.  they have some
similarities.  I want to create a common source language so I can
develop the naming languages further.  I'm not to sure how or where I
should start. so any suggestions would be great.

I was also wondering if the frequency of certain sounds or "letters"
plays in your word building.  I have studied cryptography and have been
using tricks I learned there and have been experimenting with things
like French sounds but with a frequency of German.


Mario