Language testing ; English as a second language; ESL; TESOL ; Developmental dyslexia; Reading disability; Leseschwäche; Rechtschreibschwäche; Lese-Rechtschreibschwäche; LRS; Legasthenie; Dyslexia ; Soziokulturelles Milieu; Sociocultural environment; Socioeconomic status ; Dual language acquisition; Bimodal language acquisition; Spracherwerb (biling.) ; Language acquisition (biling.) ; Bilingual language acquisition ; Script choice; Biliteracy; Multiscriptality; Mehrschriftigkeit; Digraphia ; Aetiology; Anamnese; Diffentialdiagnose; Differential diagnosis; Symptom; Syndrome; Prognosis (pathol.) ; Biomarker; Diagnosis ; English (American) ; USA (English language in the) ; USA (engl. Sprache in den) ; English in the USA; Englisch in den USA; American English