biegłość bedeutet auf Englisch

flair▼noun
natural or innate talent or aptitude

fluency▼noun
linguistics: being fluent in a language

fluency▼noun
quality of consistently applying skill correctly

fluency▼noun
quality of smoothness of flow

knack▼noun
a readiness in performance; aptness at doing something; skill; facility; dexterity

know-how▼noun
the knowledge and skill to be able to do something correctly

proficiency▼noun
ability or skill

astuteness▼

cunning▼noun
skill of being sly or deceitful

finesse▼noun
property of having elegance, grace, refinement, or skill

guile▼noun
astuteness, cunning

language proficiency▼noun
proficiency at a language