when

1. yaushe?

   And they ask ˹the believers˺, “When will this threat come to pass, if what you say is true?” = And they say, "When is this promise, if you should be truthful?"
   Kuma sunã cẽwa, "A yaushe wannan wa'adi yake (aukuwa) idan kun kasance mãsu gaskiya? = "Yaushe ne wannan alkawarin zai tabbata in dai kun kasance mãsu gaskiya ne kũ?"" --Quran/36/48, Quran/67/25

2. a lokacin da, yayin da, sa'ad da
   • Synonym: while
   1. even when they have not found anything worth crowing about. [1] <> har ma a lokacin da ba su samu komai ba. [2]
3. in da

   hence, we can understand the Prophet when he said ―I was sent except to perfect the noblest manners.
   Da wannan ne zamu fahimci maganarsa in da yake cewa: "Haƙiƙa an turo ni ne domin in cikashe kyawawan ɗabi'u". --parallel_text/Dr_Ragheb_As-Sergany's_An_Example_For_Mankind

Google translation of when

Yaushe, lokacin da.

1. (conjunction) lokacin da <> when, while;
2. (adverb) yaushe <> when;