Attention
You notice more when you cannot coast on fluency.
Language
Language learning keeps me teachable.
I do not treat it as a side credential. I like it because it keeps me attentive, patient, and comfortable not being polished yet.
Patience
Language learning rewards repetition, imperfect attempts, and slow accumulation.
Beginner mode
It is one of the easiest ways I know to keep humility and curiosity active together.