Created SC2256 (markdown)

SC2256.md

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+## This translated string is the name of a variable. Flip leading $ and " if this should be a quoted substitution.
+
+### Problematic code:
+
+```sh
+var="foo"
+echo $"var"
+```
+
+### Correct code:
+
+```sh
+var="foo"
+echo "$var"
+```
+
+### Rationale:
+
+`$".."` is a localized string, for example, `echo $"Hello $USER"` along with the proper translation files can be used to have the script say "Bonjour, youruser" in French locales.
+
+In this case, ShellCheck found a localized string whose contents is also the name of a variable. This could have happened because the user wanted a far more common quoted substitution, e.g. `"$var"`, but accidentally switched the leading `$` and `"`.
+
+### Exceptions:
+
+If you do want a localized string whose contents is also an active variable, you can [[ignore]] this warning or rename the variable.
+
+### Related resources:
+
+* Help by adding links to BashFAQ, StackOverflow, man pages, POSIX, etc!