Research projects ; Second language acquisition (language teaching) ; Zweitspracherwerb (Unterricht) ; Foreign language teaching ; English as a second language; ESL; TESOL ; Metalinguistic awareness; Phonologische Bewusstheit; Phonological awareness; Focus on form (language teaching) ; Sprachbewusstsein; Linguistic awareness ; Sociolinguistics ; Language variation/Dialectology ; Sprachattitüde; Linguizismus; Linguicism; Prestige; Sprachliche Unsicherheit; Linguistic insecurity ; English ; Walisisch; Welsh