English is very poor in pronouns.
"I, you, he, she, it, we, you, they"... There should be a plural "you". There should also be a maculine/feminine/neutral plural third person.
Something I consider unnecessary in english is the "Present Perfect". I mean, wha' is that about? The other languages don't use it and I think it is too confuse.
And there is the portuguese word "saudade". Only we, from portugal, use it. I don't know to explain what it means in english, but wikipedia does:
Saudade (pron. IPA [sɐu'ðað(ɨ)] in European Portuguese and Galician, and [sau'dadʒi] or [sau'daði] in Brazilian Portuguese) is a Portuguese word for a feeling of longing for something that one is fond of, which is gone, but might return in a distant future. It often carries a fatalist tone and a repressed knowledge that the object of longing might really never return.
Saudade is generally considered one of the hardest words to translate. It originated from the Latin word solitatem (loneliness, solitude), but developed a different meaning. Loneliness in Portuguese is solidão (a semi-learned word), from Latin solitudo. Few other languages in the world have a word with such meaning, making saudade a distinct mark of Portuguese culture.
In his book In Portugal of 1912, A.F.G Bell writes: "The famous saudade of the Portuguese is a vague and constant desire for something that does not and probably cannot exist, for something other than the present, a turning towards the past or towards the future; not an active discontent or poignant sadness but an indolent dreaming wistfulness."
Saudade is different from nostalgia (the English word, that is). In nostalgia, one has a mixed happy and sad feeling, a memory of happiness but a sadness for its impossible return and sole existence in the past. Saudade is like nostalgia but with the hope that what is being longed for might return, even if that return is unlikely or so distant in the future to be almost of no consequence to the present. One might make a strong analogy with nostalgia as a feeling one has for a loved one who has died and saudade as a feeling one has for a loved one who has disappeared or is simply currently absent. Nostalgia is located in the past and is somewhat conformist while saudade is very present, anguishing, anxious and extends into the future. In Portuguese, the same word nostalgia has quite a different meaning.
For instance, the phrase "Sinto saudade de você" ("I feel 'saudade' for you") directly translates into "I miss you". "Eu sinto a tua falta" also has the same meaning in English ("falta" and "saudade" both are translated for missing), but it is different in Portuguese. The first sentence is never told to anyone personally, but the second can be. The first sentence would be said by a person whose lover has been abroad for sometime, it would be said over the phone or written in a letter. The second sentence would be said by someone who has divorced, or whose partner is not usually at home, and would be said personally.