me: this would be a cool rp idea [proceeds to develop rp idea]
me, later: imagine if [plot idea] involved [plot device]? that would be so cool [proceeds to develop rp mechanics]
me, later x2: well if this land exists, what does the planet look like? what does cross-cultural interaction look like? [proceeds to develop a whole planet & an assortment of other countries that won't be explored in this rp idea due to limited scope]
me, later x3: bro fuck it, let me create a new language to go along with all this stuff.
me, later x4: ...maybe i need two.
(all this for an rp that idk ppl will even like... )