Find language change boundary

[PDanes]

I regularly work with documents that contain text in more than one language. I sometimes need to find the place where the language specified for text changes. Spell-check suddenly starts signalling misspelled words, and it turns out that somwhere in there, the specified language has changed from British English to US English, or some similar switch, and the dictionary for that language does not contain some technical term I have previously added to the language I *-thought-* was in use for that entire section of the document. I can track it down, slowly and painfully, by constantly moving the cursor and selecting the language dialog from the ribbon, but that is an incredible PIA to do regularly. Is there a way to locate the place in the text where the language specification changes?