Revival of the Hebrew language
The revival of the Hebrew language took place in Europe and the Southern Levant toward the end of the 19th century and into the 20th century, through which the language's usage changed from the purely sacred language of Judaism to a spoken and written language used for daily life among the Jews in Palestine, and later Israel. Eliezer Ben-Yehuda is often regarded as the "reviver of the Hebrew language" having been the first to raise the concept of reviving Hebrew and initiating a project known as the Ben-Yehuda Dictionary.
Source: Wikipedia — Revival of the Hebrew language (CC BY-SA 4.0)