WW1 leads to all European powers breaking into smaller nation states

One of the most important outcomes of the First World War was that it led to the central powers all breaking up into nation states while Russia lost its western territories to new republics in Finland and the Baltics after the Russian civil war.
Thus all of Europe east of the Rhine was henceforth made up of independent 'mother tongue republics' while Ireland gained independence from Britain.
Have this happen not just out of the central powers and Western Russia, but also France and Britain, so that Wales, Brittany, the Basque Country and Occitania all become independent. Bonus points if Scotland does too.
What happens to colonial empires?
 
The Welsh didn't want a fully independent state at this time (the movement I mean). The independence movement was so that they could have Devolution, but the party collapsed in the mid 1890's.
for Basque, have the third Carlist War either never happen or be a bloody stalemate (somehow) and make it to where the Basque self-government isn't abolished.
The Breton Regionalist Union was created in 1898 but didn't have much support at home or really anywhere. They claimed that socialism was their enemy however many believed that they had strong ties to Nazism. I could be wrong but I believe this group was only to preserve the cultural independence of Brittany, not a nation state (considering the fact that the historical duchy of Brittany is split into five provinces.)
and for Occitania, while their was a strong revival of the culture in the 19th century, I can't find anything that would signal an independence movement of any sort from around the time of WW1
 
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