WD: "No Proofing" Is Selected If Two Languages Are Selected

In Microsoft Word, if you select text that contains formatting for two or more languages, and you then click Language on the Tools menu, the Mark Selected Text As box appears to indicate that No Proofing is selected.

The Mark Selected Text As box cannot display more than one selection at a time. If you select text that contains formatting for two or more languages, the list box is displayed with the focus at the top (which may make it appear to be selected), however, this effect is not a selection.

If you press the TAB key, the focus shifts to the OK button. If you unintentionally select the No Proofing option by pressing the SPACEBAR and clicking OK, the selected text will be set to No Proofing and will not be checked if you subsequently run the Spelling or Grammar command.