What are the main voter bases of the All-India League, the Liberals, and Swaraj in terms of what sectors of Indian society are more likely to vote for them and what regions they're most popular in?
In general terms:
- All-India League - a broad church catch-all soft-nationalist party. Its policy platforms generally support Indian unity, the promotion of Hindustani and maintaining India's strong military tradition. The party is generally more populist and economically interventionist than the Liberals, but in a fairly non-ideological way. It supports a continued close relationship with the British Empire but is sometimes more ambiguous on this than the Liberals, and League prime ministers tend to try and throw their weight around in imperial matters a bit more. The party is also skeptical of civil liberties and has authoritarian tendencies. As a catch all party, it's kind of hard to say where its "voter base" is, as such, although its leaders have generally been drawn from the Punjabi Muslim population (but the party is staunchly non-sectarian).
- Liberal Party - originally your standard liberal conservative party, by the 1960s it is moving towards a more socially liberal position too. It regards itself as the party of fiscal rectitude and generally supports low taxes and small businesses, although because they, in practice, are only able to enter government with the help of Swaraj, these commitments are tempered somewhat. The party takes a strong pro-imperial stance but its leaders are often criticised by the League as being overly subservient to the British. Its support base comes from a mixture of traditional conservative voters - the zamindars, conservative smallholders etc - with the increasing addition of some urban intellectuals attracted by their increasing social liberalism.
- Swaraj - the closest you have to a traditional party of the centre-left, with all the usual commitments to workers rights and links with trades unions that you'd expect. At the same time, it is also very strongly socially conservative and deeply influenced by Hindu social teaching. The impression that the party is kind of a cover for Hindu sectarianism is, combined with the restricted franchise, a big reason why they remain a firmly third party.
Are there any strong republican tendencies in India?
Yes and no. If you're a Liberal member or supporter then you'd struggle to find a republican amongst them, although they did support the decision to appoint an Indian-born viceroy (partly for ideological reasons but also because it was a convenient way of getting rid of Khizar). Republicanism is more common in the League, although not generally among the top brass and even then most members and supporters aren't that exercised about it. (For reference, think about something like the prevalence of republicanism in the OTL UK Labour Party.) But as a nationalist party the League does pursue some important symbolic policies like having an Indian-born viceroy and mandating that Indians sit on the boards of Indian branches of imperial companies. It's much more common amongst Swaraj, for obvious reasons, but again it's never seen as something important enough for it to become a big question in coalition negotiations or anything like that.
Anything happening in Spain? But for the 1930 coup, nothing seems to happen down there.
I had originally planned to go into Spain in much more detail but decided to cut that back because this whole project was getting close to being too big and Spain isn't that much of a politically important country TTL anyway. The basic idea is that there is a succession of liberal moderate governments which are replaced by nationalist military regimes in coups in 1930, 1948, 1962, 1968, 1975 and 1992. The idea is that it's a bit of a parody of 19th century Spain mixed in with the worst case scenario for OTL Latin American countries.