The League also applied to the World Esperanto Association (Universala Esperanto-Asocio, UEA) for official recognition of BEL as a "kunlaboranta faka asocio" (a cooperating specialised subgroup) of UEA.
From 1936 to 1955, a villa in Heronsgate was the global headquarters of the International Esperanto-League (since 1947 called World Esperanto Association).
It also maintains an information center and an important Esperanto library, called the Hector Hodler Library.
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Esperanto is not the primary language of any geographic region, outside of temporary gatherings (such as conventions like the World Congress of Esperanto) and isolated offices (such as the World Esperanto Association's central office in Rotterdam).