1. An accomplishment or success that occurs outside of formal or official settings, structures, or recognition systems
Learning to cook well through family recipes is an informal achievement that many people are proud of.
Aprender a cozinhar bem através de receitas familiares é uma realização informal da qual muitas pessoas se orgulham.
2. Skills, knowledge, or competencies acquired through experience, practice, or self-teaching rather than through formal education
His informal achievement in programming came from years of personal projects and online tutorials.
Sua realização informal em programação veio de anos de projetos pessoais e tutoriais online.