Yes, that's probably what it means. Underfoot is missing other files as well as noted on the wiki. You can probably get the files you need from the live client although I have not tried it recently. An easy way to do so is get the live client and copy all of the files into your Underfoot directory and don't replace any files that already exist. You'll end up with files you don't need, that way, but you don't need to pick and choose. The one file you do want to replace is dbstr_us.txt. Live may or may not be the best source for that, but no matter which client you get it from you'll have some issues with AA descriptions and such.
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