I noticed that on my Ubuntu machine, there's a setting labeled
Mostrar el estado de la batería en la barra de menús
with dropdown options:
- Cuando esté presente la batería
- Cuando la batería esté cargandose o en uso
My question is, why do these appear to be in the subjunctive? I'm studying Spanish at an intermediate student level in school, and from what I've been taught, I'd write these using indicative, similar to "Cuando está presente la batería".
Can someone shed some light on this? Is there a rule (in certain locales, perhaps) that selects for subjunctive for such phrases?