Whakaotihia te rerenga e whai ake nei: Mai i Basel, kei reira ia e whakangungu ana e Alan Wisslé, i ako ia i te whakahaere pakihi i te Whare Wananga o St. Gallen. I whiwhi a Lang i tana wheako tuatahi o te ao i te 2013 European Youth Summer Olympic Festival (EYOF) i Utrecht i mutu ai ia i te tuawhitu me te peke 1.72m. I te tau e whai ake nei i whakataetae ia i te 2014 Summer Youth Olympics i reira i eke ai ia ki te tuarima o nga waahi me te peke 1.73m. I uru ia ki te 2015 European Athletics Junior Championships i Eskilstuna ka mutu i te 7 me te peke 1.79m. I mutu ano ia i te 7th i te 2016 IAAF World U20 Championships i Bygdoszcz me te teitei o 1.83m. Ko ia te tuawha i te
2017 European Athletics U23 Championships ano i Bydgoszcz me te peke 1.86m. I te tau 2020 i whakatauhia e ia he rekoata Swiss hou i roto i te whare me te 1.94 m i St. Gallen i whakanohoia e ia te 8 o te ao mo te tau. Kua wikitoria a Lang i nga taitara a motu maha; i te 2014, 2015, 2017, 2019 me te 2020, ko Lang te toa o Switzerland i te peke teitei i waho, i te 2016 me te 2019, 2020, me te 2021 hoki i roto i te whare.