I'll try to explain, but that's my first answer at language-section of stack, so be free to ask me
Местный падеж
is similar to Предложный падеж
in russian so word will answer to question Where?
, but main difference that Местный падеж
give us information about item's position. Anyway, this difference is so small, that there're no Местный падеж
in russian, that's just a type of Предложный падеж
. For example:
- Where's Your largest birthmark placed?
- On my side
In russian
- Где твоя самая большая родинка?
- На **боку**
Местный падеж
specifies the place of action. So there're usual words likeв лесу
,в городе
, etc- There are two preposition used with
Местный падеж
:в
ина
(в лесу, на дереве) Местный падеж
isПредложный падеж
with specifying place of action- Use
Местный падеж
if word answer toWhere?
and specifying place of action. Anyway You'll use rules fromПредложный падеж
, 'causeМестный падеж
is part of it.
Bonus:
I have no ideas in fact