When the user is typing in Word, instead of explicitly requiring them to go through the user interface to add a tag, we could allow them to enter formatted text as a placeholder where a tag could be introduced. E.g., the user could type The mean value was <mean_value>.

When invoking some menu action, StatTag would read the text and replace <text> with actual StatTag tags. It could use a heuristic to determine the most likely match, instead of requiring an exact match. For example, if there is a tag named mean_value and the user enters <Mean value> StatTag could determine this is likely the mean_value tag and insert it.