Labor (4) Language and languages (4) Lenguaje (4) Trabajo (4) Tongue (3) Literature (3) Lengua (3) Literatura (3) Production (Economic theory) (2) Perception (2) Linguistics (2) Factores (2) Identidad (2) Datos (2) Percepción (2) Producción (2) Lingüística (2) production (2) identité (2) Youth (1) Vowels (1) Trials (1) Sociology (1) Reading (1) Prejudices (1) Physicists (1) Perspective (1) Paper (1) Noise (1) Measurement (1)