It's cool, although it is primarily a feature of English, not languages, languages Latin alphabets or even Germanic languages in general.
For the party trick to work the words of the language in question must have relatively short words, and suitably small but syntactically heterogenous paradigms for any given lexeme, with changes expressed mainly by the end of the word. (Paradigm: for example conjugations are paradigms of verbs, declension are paradigms of nouns; lexeme: "fundamental base word").
In some languages individual letters in the middle of the word morph as the meaning of the word changes (different tenses of verbs, different number or gender of people/objects, whether an action is ongoing/finished/planned, whether a statement is a question or a command).
This is pretty cool