Only strong words survive!Rarely used words change more often than words that are used often. That could be due to the laws of evolution. Common genes change less in the course of time. They are more stable in their form. And apparently the same is true for words! English verbs were evaluated for a study. In it, current forms of the verbs were compared to old forms. In English, the ten most common verbs are irregular. Most other verbs are regular. But in the Middle Ages, most verbs were still irregular. So irregular verbs that were rarely used became regular verbs. In 300 years, English will have hardly any remaining irregular verbs. Other studies also show that languages are selected like genes.
Researchers compared common words from different languages. In the process they chose similar words that mean the same thing.