I would like to learn a language which has cases which cannot be mistaken for other cases, in pronunciation and writing. Does such a language exist?
For an example of what I want to avoid: The case endings of 'ИЯ' nouns in Russian for genitive, prepositional, nominative plural and dative cases are all the same - 'ИИ'.
So, if a language were to have six cases; Nom, Acc, Gen, Prep, Dat, Inst. Six for singular and six for plural. There would be twelve unique case affixes in total.
So, a rule for the sought after language would be, once you learn the one affix for a case, you then know how to decline all nouns in that case. All cases would be unique in pronunciation and writing.
Example: 'book' becomes,
Nom Acc Gen Prep Dat Inst Sing bookat bookam bookem bookim bookom bookum Plur bookati bookami bookemi bookimi bookomi bookumi