Function tr 

pub fn tr(en: &'static str, pt: &'static str) -> &'static str

Translates a bilingual message by selecting the active variant.

v1.0.36 (M4): inputs are constrained to &'static str so the function can return one of them directly without Box::leak. The previous implementation leaked one allocation per call which accumulated in long-running pipelines; this version is allocation-free. All in-tree callers already pass string literals, which are &'static str.