OET interlinear YOEL (JOEL) 2:9

uW Translation Notes:

Note 1 topic: figures-of-speech / litany

בָּ⁠עִ֣יר יָשֹׁ֗קּוּ בַּֽ⁠חוֹמָה֙ יְרֻצ֔וּ⁠ן בַּ⁠בָּתִּ֖ים יַעֲל֑וּ בְּעַ֧ד הַ⁠חַלּוֹנִ֛ים יָבֹ֖אוּ כַּ⁠גַּנָּֽב

(Some words not found in UHB: on,city rush on,wall they,run in,houses climb behind the,windows they_went like,thief )

See the discussion in the introduction to Joel of the litany form and how you might format this verse in your translation to show that Joel is using litany.

Note 2 topic: figures-of-speech / simile

בְּעַ֧ד הַ⁠חַלּוֹנִ֛ים יָבֹ֖אוּ כַּ⁠גַּנָּֽב

(Some words not found in UHB: on,city rush on,wall they,run in,houses climb behind the,windows they_went like,thief )

The point of this comparison is that just as thieves enter unexpectedly and undetected through windows, so the locusts get into homes in ways that people do not anticipate and so, cannot prevent. If it would be helpful in your language, you could make this point explicitly. Alternate translation: [they get into homes in unexpected ways, just as thieves sneak in through windows]