Wim de Villiers formed a management team in 2015 to resolve the language issue on behalf of the university. The management team decides that all teaching at Stellenbosch University will be facilitated in English and that substantial academic support will be made available in other South African languages according to students' needs.[4]
In 2017, the university became one of four South African universities to abolish Afrikaans as a language of instruction. De Villiers is in favor of expanding the use of English to more than 50% to attract more international students and lecturers.[2]
On 6 August 2017, Netwerk24 reported that court documents were submitted to the High Court in Cape Town alleging that De Villiers deliberately misled the council of Stellenbosch University in his fight to remove Afrikaans as a language of instruction at the university acquire.[5]
In October 2019, the Democratic Alliance called for an independent investigation into De Villiers' alleged attempts to bribe Judge Edwin Cameron by offering Cameron the chancellorship in exchange for a decision in the Constitutional Court of South Africa in favor of Stellenbosch University's policy to abolish Afrikaans as a language of instruction.[6] De Villiers denies that he could have influenced the election of Edwin Cameron as chancellor. An investigation cleared De Villiers of any blame.
In 2023, Vice-Chancellor Wim de Villiers was charged of nepotism.[7][8] He allegedly used his discretionary right to secure a place for his wife's nephew at the university's medical school.[9][10] An investigation into the case found that there was no misconduct that warranted his removal from office but that he would have to face financial consequences.
On Sunday 27 October 2024, Edwin Cameron accused Wim De Villiers of fraud involving the report on Wilgenhof residence.