The languages that use the question mark "?" seem to do it in a fairly uniform fashion, but I have the feeling that the full stop "." and the exclamation mark "!" are used slightly differently in different languages, even European ones that use both. This is a matter of degree - which expressions are worth the exclamation and which not.
It seems that the rules for using the comma "," are reasonably easy to find out. But how to find out the possible differences in the use of exclamation mark and the full stop? (I am mostly interested in Finnish, Northern Germanic languages, English and French, but would prefer a general method or source, if one exists.)