Universal 1933: impersonal indefinite is borrowed ⇒ temporal indefinite is borrowed
Original
If there is a word-form loan of an impersonal indefinite, then it is likely that there will be a word-form loan of a temporal indefinite of the same indefiniteness function, too.
Standardized
IF there is a word-form borrowing of an impersonal indefinite, THEN it is likely that there will be a word-form borrowing of a temporal indefinite of the same indefiniteness function, too.
mainly based on survey of Romani dialects (Indo-Aryan, IE), but also Aromunian (E. Romance, IE), Chamorro (W. Malayo-Polynesian), Saami (Finno-Ugric, Uralic), Swahili (Benue-Congo, Niger-Congo), Spanish (Romance, IE), Persian (Iranian, IE), Turkic languages, Dardic languages, Albanian (Albanian, IE), Kormakita Arabic (Semitic, Afro-Asiatic) and others
BugurdÏi Romani (Kosovo, Macedonia): The impersonal free-choice indefinite ‘stogod’ (=anything) is a word-form loan from Serbian, but the temporal free-choice indefinite ‘bilo kana’ (=anytime) contains an indigenous base (Elsík 2001: 136)