Needs assessment (language teaching) ; Deafhood; Deaf culture; Gehörlosenkultur; Deaf studies; Language and culture (sign language) ; Deaf education; Bicultural education (Deaf education) ; Bilingual education (Deaf education) ; Identität und Sprache; Identity and language; Fremdheit und Sprache; Estrangement and language; Sprache und Integration; Integration und Sprache; Language and identity ; Critical period (language acquisition) ; Alter (Einfluss auf Spracherwerb) ; Age (influence on language acquisition) ; Age of acquisition; AoA; Sensitive period (language acquisition) ; Zweisprachigkeit; Bilingualism ; Bilingualism, bimodal; Bimodal bilingualism ; Taubheit; Deafness