Dual language acquisition; Bimodal language acquisition; Spracherwerb (biling.) ; Language acquisition (biling.) ; Bilingual language acquisition ; Bilingual aphasia; Speech pathology (biling.) ; Sprachfehler; Language attrition (pathol.) ; Language loss (pathol.) ; Sprachverlust (pathol.) ; Speech pathology ; Language intervention; Children (speech therapy with) ; Speech therapy for children ; English ; Spanish