Analysis of information sources in references of the Wikipedia article "Blighty" in English language version.
After the introduction of conscription in 1916, the distinction between soldiers and civilians became less clear, and vocabulary passed readily from one group to the other. This is the case with ... Blighty. The Urdu words vilayat ("inhabited country", specifically Europe or Britain) and vilayati ("foreign", or "British, English, European") were borrowed by the British in the 19th Century.... But it was the regional variant bilayati - rendered as Blighty in English and meaning "Britain, England, home" - which really took off in Britain. Although it was first used during the Boer war, it was not until WW1 that Blighty spread widely and developed new meanings.
in the Collins English Dictionary – Complete and Unabridged, 12th Edition 2014; and in Random House Kernerman Webster's College Dictionary
