I´m Argentinian, in Spanish we name them verano (summer), otoño (fall), invierno (winter) and primavera (spring)
A note about English...
As the previous four members have all used the word 'autumn' for the season following summer, it's probably worth pointing out that 'fall' is only used in American English. All the other seasons are the same, though!
In Dutch/Flemish:
summer : zomer
autumn : herfst
winter : winter
spring : lente
In Azerbaijani
summer --- yay
autumn -----payız
Winter-----qısh
spring ---- yaz or bahar
Here in Brazil:
Summer: verão
Autumn: outono
Winter: inverno
Spring: primavera
Spring: Bahaar
Summer: Taabestan
Autumn(Fall): Paayiz
Winter: Zemestaan
Good discussion :)