1. A method comprising: determining, by one or more computing devices, which human writing system is associated with text characters in a string of one or more text characters based on values representing the text characters; when said values are associated with more than one human language, comparing, by the one or more computing devices, the string with a targeted dictionary to identify a particular said human language associated with the string; and designating, by the one or more computing devices, which linguistic services are available based on one or more service properties of the linguistic services and based on the particular said human language associated with the string.