sans voix znamená v Angličtina

speechless▼◼◼◼(not speaking; not knowing what to say)
adjective
[UK: ˈspiːt.ʃləs] [US: ˈspiːt.ʃləs]

tongue-tied▼◼◻◻(unable to express oneself clearly or fluently, see also: at a loss for words; speechless)
adjective
[UK: ˈtʌn taɪd] [US: ˈtʌn taɪd]