Bugfix: regular expression parsing logic for error message translation is incorrect

Bugfix: regular expression parsing logic for error message translation is incorrect

preg_replace() may return a non-string, so validate its value before replacing.
- if something goes wrong, then keep original string.

With the use of arguments that begin with ':{' and end with '}', the '/b' command is preventing the regular expressions from working.

If the detail value is not a string, instread provide an empty string for replacement.