Why Is English related to other Languages?

Answer 1

Take a look at the history of England--you have the Celts, then the Roman invasion and occupation from 44 BCE on, the the collapse of the Roman Empire and the invasions by the Norse and Anglo-Saxons, who settled in.
The Germanic languages spoken by the Anglo-Saxons and Norse meshed with the Celtic dialects spoken by the native Celts, forming Old English. Then, in 1066, along came the Norman invasion (the French). After several centuries of French dominance, English re-asserted itself, by this point having evolved with the French influence in Middle English.
There were then several centuries where English evolved along, eventually becoming Early Modern English (that's what Shakespeare wrote in), where writers borrowed heavily from Greek and Latin.
In short, English is related to other languages because people are sociable animals and like to communicate with each other, but also innovative animals, and so languages also evolve.

Answer 2

English is related to other languages through a process known as language evolution or language change. English has borrowed and adopted words, grammar structures, and sounds from other languages over centuries of contact, trade, and colonization. This has led to English sharing similarities with other languages, especially those within the same language family or regions of contact.