It&#x27;s not (just) the vocabulary. Besides a the history it&#x27;s primarily the inflection system that Romance languages have in common.<p>Compare for example English with Spanish, Italian and Portuguese:<p><pre><code>    en                  es    it      pt
    I go		voy   vado    vou
    He&#x2F;She goes	        va    va      vai
    We go		vamos andiamo vamos
    They go		van   vanno   vao
</code></pre>
While the Romance Languages are very similar, English is completely different.