As someone who doesn't speak a language with noun cases, could someone explain what those things are, and how they are used? Because when someone starts talking about the dative or ablative case, it's just noise to my ears...
I'd also have to say, this is not just a language that should be easy to learn, but also a language that should be easy to machine translate back and forth without any loss of meaning. As in, every term needs to have a 1:1 relationship between this language and English for the program to be able to easily print both forms of text.
I speak English, and we don't have noun cases. Neither do a lot of languages.
A lot of old languages, especially, do, though: Latin is the most well-known/cited example.
Other languages have more or less cases, or different uses, but in Latin there are six (technically seven, but no one uses the seventh). There are a few other uses for each case, but these are by far the most common:
Nominative: Refers to the
subject of the clause; whatever is performing an action.
Genitive: Used with other nouns to indicate
possession; translates into English as either "of" or "apostrophe-s".
Accusative: Refers to the
direct object of the clause; whatever is affected by the subject's actions.
Dative: Refers to the
indirect object of the clause; whatever the direct object is being given, told, shown, etc. to, as in "I gave a gift
to the person".
Ablative: In Latin, formed from the earlier locative, instrumental, and ablative case. A very versatile case, used with most
prepositions or as the
means or manner in which the main verb is carried out.
Vocative: Refers to the person being
addressed; only used in speech, such as calling to your friend "Dude, come over here!". Identical to the nominative except in the second declension, but that's not really important.
(Locative: Mostly assimilated into the ablative, refers to
location: in, at, on, etc. In Latin, only used to refer to "small islands", or in the case of a few nouns. Always identical to the genitive.)
Other languages with declension include:
German (four cases: nominative, genitive, accusative, dative)
Sanskrit (a dead language, like Latin; seven cases: six as in Latin, plus the instrumental)
Czech (seven cases: six as in Latin, plus the instrumental)
Pre-Modern Dutch (four cases, same as modern German; modern Dutch has no cases)
Irish Gaelic (four cases: nominative, vocative, genitive, dative, though in many classes of nouns one form is used for several)
Old English (again, dead; four cases, same as modern German)
Middle English (again, dead; three cases: same as modern German/Old English, but with the nominative and accusative merged)
Russian (six cases: same as Latin, minus vocative/locative and with the ablative split into the prepositional and instrumental)
It's also worth noting that, while all the above are Indo-European, some non-Indo-European languages spoken in Europe have taken on declension: Finnish and Basque have incredibly complex and confusing ones. Many non-European languages have cases of some form, but they tend to be rather different from European ones. Furthermore, virtually all Indo-European languages hold some form of case-based declension: pronouns are the main refuge of the system...
There is an interesting Wikipedia article on the subject:
http://en.wikipedia.org/wiki/List_of_grammatical_casesHope this helps. Probably doesn't, but that's because I've studied this shit and have never really had to explain it to others.