 In contrast, Zamenhof declared that "Esperanto belongs to the Esperantists", and moved to the background once the language was published, allowing others to share in the early development of the language.The grammatical description in the earliest books was somewhat vague, so a consensus on usage (influenced by Zamenhof's answers to some questions) developed over time within boundaries set by the initial outline (Auld 1988).Even before the Declaration of Boulogne, the language was remarkably stable; only one set of lexical changes were made in the first year after publication, namely changing "when", "then", "never", "sometimes", "always" from "kian", "tian", "nenian", "ian", "ĉian" to "kiam", "tiam", "neniam" etc., to avoid confusion with the accusative forms of "kia" "what sort of", "tia" "that sort of", etc.