I would say that you typically don't need to use some in front of words and phrases that are fallowed by such as.
The Roman alphabet is used in many modern languages such as French, English and German.
Why is that true? I think it's because when we're talking about some of something, we imply that there is still some more of it left that we decided not to include in the group that we're interested in considering. So, some dynamic properties such as implies that there are other properties in the whole list of all available properties not explicitly mentioned that are not provided in addition to blah blah blah.
I'm not sure if my explanation makes perfect sense.