1. 非官方的：而这些说法是民间版/非官方的 (unofficial)与 昵称(nickname) ,还是官方的头衔,这才是问题的重点. 这也是台湾国国内目前的争议所在. 否则,李登辉早被叫做「台湾之父」或「台湾国父」,难道,这些民间称呼可以变成中华民国官方对李登辉的称呼?

2. 非官方的,非正式的：unlisted stock 非挂牌上市股票 | Unofficial 非官方的,非正式的 | Unpaid 未付的,未缴的

1. 非官方的；未经正式批准的；非正式的
An unofficial action or statement is not organized or approved by a person or group in authority.

e.g. Staff voted to continue an unofficial strike in support of seven colleagues who were dismissed last week...
职工投票决定继续进行非正式罢工，以支持上周被解雇的7名同事。
e.g. Official reports put the death toll at under one hundred, but unofficial estimates speak of at least two hundred dead.
官方报道说死亡人数在100人以下，但非官方估计至少有200人死亡。

adj

1. not having official authority or sanction

e.g. a sort of unofficial mayor
an unofficial estimate
he participated in an unofficial capacity

2. not officially established

e.g. the early election returns are unofficial