There doesn't have to be any patent associated with any particular language.
Patents can accrue to, among other things, "any useful method..." for X where X itself needn't be useful, and needn't be expressed in any particular language, computer or natural.
It's entirely possible, if not actually likely these days, that in the process of developing anything useful, you'll wind up re-inventing something that's already been granted a patent, however obscure.
It's not a good excuse to stop working altogether. You can at least hope that any patent has already expired or any infringement, deliberate or unintentional, will go unnoticed or unprosecuted. Worst case, you may have to pay for a license, but unless you're making a fair amount of money, that's unlikely.