Sanskrit
Orientalist scholars of the 18th century like Sir William Jones marked a wave of enthusiasm for Indian culture and for Sanskrit. According to Thomas Trautmann, after this period of "Indomania", a certain hostility to Sanskrit and to Indian culture in general began to assert itself in early 19th century Britain, manifested by a neglect of Sanskrit in British academia. This was the beginning of a general push in favor of the idea that India should be culturally, religiously and linguistically assimilated to Britain as far as possible. Trautmann considers two separate and logically opposite sources for the growing hostility: one was "British Indophobia", which he calls essentially a developmentalist, progressivist, liberal, and non-racial-essentialist critique of Hindu civilisation as an aid for the improvement of India along European lines; the other was scientific racism, a theory of the English "common-sense view" that Indians constituted a "separate, inferior and unimprovable race".

Q: When was Sanskrit and Indian culture popular?
18th century