The 9th of Av is associated with the destruction of the Second Temple in Jerusalem by the Romans in 70 CE. This catastrophic event led to the diaspora of the Jewish people, including their eventual settlement in England either with or shortly after the Norman invasion in 1066.
The English word "Jew" has a linguistic connection to this historical event. The term "Jew" is derived from the Old French "iuw," which comes from the Latin "Iudaeus," meaning "from Judaea." Judaea was the Roman name for the southern part of Palestine, named after the ancient kingdom of Judah, the region where the Romans destroyed the Temple.
In 1290, King Edward I ordered the expulsion of all Jews from England. The expulsion day was July 18th 1290, which corresponded to Tisha Be’Av that year. For nearly four centuries, there were almost no Jews in England, and none spoke the English language. Even after their readmission in the 1650s, Jews primarily continued using their native languages – Yiddish for the Ashkenazi Jews and Spanish or Portuguese for the Sephardi Jews. It took at least two generations before Jews in England began adopting English as their vernacular.