Actually, you can use more or less any printable and sometimes even unprintable characters (like linefeeds) in tags.
So it is more in the responsibility of the editor to select the correct characters.
Right now, only one of them is actually an apostrophe:
U+2019 : RIGHT SINGLE QUOTATION MARK {single comma quotation mark}
U+0027 : APOSTROPHE {single quote; APL quote}
Here is a thread that deals with other similar looking characters:
Yes, this would be the best solution.
A possible way to replace the variations with just one character is also mentioned in the linked thread