>>5
probably chinese because it hardly has any grammar at all.
Please look up "grammar" in a dictionary. You'll find that "grammar" is the set of rules that dictate what words go where in a sentence, as well as what shape and form they should have. Consider the sentences "Alice sees Bob" and "Bob sees Alice"; grammar is how you know which sentence means what.
Chances are you're looking for words like "tense" (like "go/went/gone", "see/saw/seen"...), "case system" ("i/me/my/mine", "he/him/his...), or somesuch.
If you're thinking stuff like "noun genders", this is one of two main ways a language classifies nouns; the other is "classifier" (long story, check the Wiki).
Guess what, all languages use one or the other, English being the only exception I know of. Chinese (as well as Japanese) uses classifiers.
(Also, In My Oh-So-Humble Opinion, noun classifier systems are more logical than noun genders, even if it (initially) requires that you learn some more words at first).
>>12
Logical answer ;-)