A family of Microsoft word processing software products for creating web, email, and print documents.
I also encountered the same problem when inputting Chinese. Here is an easier way to get out of this, and hopefully it extends to other language modes as well.
When the "finalize the string" box comes up, Switch the input mode from Chinese to English. The switch can be either from Chinese mode to standard English mode, or from "Chinese" in Chinese mode to "English" in Chinese mode. Then switch the input mode back to Chinese. Type a few English letters before switching back if necessary, in case the FTS box is not easily fooled. The FTS box should disappear after switching back.
Too bad such a long time has passed and there is still no "official" fix.