Long Term effects of a changed Spanish Civil War?
It's very unlikely that a mostly victorious Republican Spain would just result in the same Cold War as OTL, just with a few additional partners!
If a civil war is mostly about the desire of a region to seceede, they might win if the central government collapses or just becomes to tired of the entiry effort and thus pulls the plug.
If, OTOH, both parties try to get control over the entire country, a ceasefire and hence division is very unlikely, unless foreign powers step in, or the defeated party holds to a part of the country that the other can't take due to geography. (e.g. Taiwan).
This is unlikely in the case of Spain (a defeated Franco holding on to the Canary Island and the Balearics + Spanish Morocco might be a possiblity, but that's about it.).So if the republicans win - say in 1938 - and are mostly communist controlled by then, this would chance the European situation during the lead up to WWII quite a bit...
If Hitler still invades Austria and the Sudentenland on schedule - may be..
Does he still occupy the czech rump state in spring 1939? Already less certain - How would France and Britain have reacted to a sucessful republican Spain - is it a new ally - or a new threat? Depending on their perception, they might follow a harder line against Hitler - may be as early as no Munich - or they might decide that the emerging alliance of 'Soviet Russia and Soviet Spain' (as many might claim) is the bigger threat than the Nazis, and therefore there is no guarantee to Poland.
The start of the war on September 1, 1939, with the same alignement as OTL, is in no way certain, and from here, many later changes would follow.