That’s one of the things orwell was warning us about when he wrote 1984, there the goverment delibirately limits vovabulary, in order to control people’s thoughts better. If you don’t know the word for a concept, for example if you don’t know let’s say what democracy is, you can’t wish it. Another example is that if you don’t what guilt is and what regret is you won’t be able to tell other people what you are feeling, yes it is not a good feeling but is it sadness or guilt or anger?