I want to know the answer to the following question:
What pressure influenced the shift in South Africa from the use of European Dutch in the 1920s?
All the background I'm provided with is that "In 1925, section 137 of the 1909 constitution of the Union of South Africa was amended by Act 8 of 1925, stating "the word Dutch in article 137 [...] is hereby declared to include Afrikaans".". Is that enough to answer the question?