Which is the hardest word to translate in this sentence?
哪一个单词是这个句子中最难翻译的？
'Know' is easy to translate.
“know”是很容易翻译的。
'Pep rally' doesn't have a direct analog in a lot of languages and cultures, but can be approximated.
“pep rally”在许多语言与文化中没有一个直接的对应意义，但是可以被猜出含义。
But the hardest word there is actually one of the smallest: 'you.'
这里最难的单词实际上是最短小的“you”。
As simple as it seems, it's often impossible to accurately translate 'you'
尽管它看起来很简单，实际上经常很难准确翻译出“you”，
without knowing a lot more about the situation where it's being said.
在不大清楚具体被应用的语境下。
To start with, how familiar are you with the person you're talking to?
首先，你对你讲话的对象到底有多熟悉？
Many cultures have different levels of formality.
在许多文化中都有着不同标准的礼节。
A close friend, someone much older or much younger, a stranger, a boss.
一个亲近的朋友，一个年长或是年幼许多的人，一个陌生人，一个上司。
These all may be slightly different 'you's.'
这些用“you”的时候都有细微的差别。
In many languages, the pronoun reflects these differences through what's known as the T–V distinction.
在许多文化中，代词的不同通过被称为T-V distinction（即用复数形态来表示来表示敬语）来反映这些差异。
In French, for example, you would say 'tu' when talking to your friend at school, but 'vous' when addressing your teacher.
比如说在法语中，你可能会在学校里和你的朋友聊天时用“tu”来称呼对方，但是当与你的老师讲话时便会用“vous”。
Even English once had something similar. Remember the old-timey 'thou?'
甚至在英语中也曾经有过类似的情况。还记得古风的“thou”吗？

Ironically, it was actually the informal pronoun for people you're close with,
讽刺的是，它实际上是对你亲近的人的不正式的人称代词，
while 'you' was the formal and polite version.
然而现在所用的“you”才是一种更加正式、礼貌的版本。
That distinction was lost when the English decided to just be polite all the time.
这种差异已经在英语决定只维持礼节性之时就遗失了。
But the difficulty in translating 'you' doesn't end there.
不过在翻译“you”的时候的差异并没有就此终结。
In languages like Hausa or Korana, the 'you' form depends on the listener's gender.
比如说在豪萨语和科拉纳语中，“you”的这个形式取决于听者的性别。
In many more, it depends on whether they are one or many, such as with German 'Du' or 'ihr.'
而更多的情况下，它取决于听者究竟是一个还是很多，比如说德语中的“du”和“ihr”。
Even in English, some dialects use words like 'y'all' or 'youse' the same way.
即使在英语中，某些方言以同样的方式用类似于“y'all”或者是“youse”的词。
Some plural forms, like the French 'vous' and Russian 'Вы'
有些复数形式，比如说法语中的‘vous’和俄语中的“Вы”，
are also used for a single person to show that the addressee is that much more important, much like the royal 'we.'
也都是由一个人来表示语言接收方的至关重要性，非常像高贵版的“we”。
And a few languages even have a specific form for addressing exactly two people, like Slovenian 'vidva.'
并且很多语言甚至都有特殊的形式来额外强调仅仅两个人，比如说斯洛文尼亚语的“vidva”。
If that wasn't complicated enough, formality, number, and gender can all come into play at the same time.
如果还不够复杂的话，关系、数量与性别都可以同时出现对选词产生影响。
In Spanish, 'tú' is unisex informal singular, 'usted' is unisex formal singular,
在西班牙语中，“tu”是一个不分性别的非正式的单数词，“usted”是一个不分性别的正式单数词，
'vosotros' is masculine informal plural, 'vosotras' is feminine informal plural,
“vosotros”是一个阳性的非正式的复数词，“vosotras”是一个阴性的非正式的复数词。
and 'ustedes' is the unisex formal plural. Phew!
“ustedes”是一个不分性别的正式的复数词。唉哟！
After all that, it may come as a relief that some languages often leave out the second person pronoun.
说了那么多，让人释然的是，有些语言常常省略掉第二人称代词。
In languages like Romanian and Portuguese, the pronoun can be dropped from sentences
在像罗马尼亚语和葡萄牙语中，代词可能从句子中省略掉，
because it's clearly implied by the way the verbs are conjugated.
因为很明显地，动词结合的方式就直接将其给指了出来。
And in languages like Korean, Thai, and Chinese, pronouns can be dropped without any grammatical hints.
又比如在韩语、泰语及汉语中，代词可以在没有任何语法暗示的情况下给省略掉。
Speakers often would rather have the listener guess the pronoun from context
讲话的人常常更倾向于让听众根据上下文来猜这些代词，
than use the wrong one and risk being seen as rude.
而不是使用错误的代词，冒着被看作是粗鲁的风险。
So if you're ever working as a translator and come across this sentence without any context:
所以如果你曾有当过笔译者，然后碰见这个句子并且没有任何上下文联系：
'You and you, no, not you, you, your job is to translate 'you' for yourselves'... Well, good luck.
“你和你，不，不是你，你，你的工作是为了你自己翻译“你”。那么，祝你好运咯。
And to the volunteer community who will be translating this video into multiple languages: Sorry about that!
而对于那些将要把这个视频翻译成多种语言的义务翻译者们，抱歉咯！