The Greek that is typically translated as “boldness” in English is often translated in the the widely-used Mandarin Chinese Union Version with an existing Chinese proverb: tǎnrán wújù (坦然无惧) or “calm and fearless.” (Source: Zetzsche)
In Makonde it is translated as “being strong in heart.” (Source: Pioneer Bible Translators, project-specific notes in Paratext)