InDesign CS5.5 doesn't honor original Language (for spelling)

Question

I'm using InDesign CS5.5 and always import .DOC and .RTF files. The default language in the "character" tab is Spanish. So is the default paragraph style. However, most of the times I import these files they are placed with English, Estonian, Croatian, etc., etc., etc. I have to change it almost in 90% of the files I place. And if I place the same file more than one time, it get placed with different languages every time. I've cheked the original .DOC and RTF files and are in Spanish dictionary.
Is that a bug? Am I doing something wrong?
Thanks,
Diego
InDesign CS55 / Windows XP

Answer 1

I also override all styles when applying. The only thing, so far, that doesn't work is the language.
I placed that file into CS5.5 and it comes in with English in the Normal style. The Normal style in Word is also defined as English. Something is very wrong, here. You can define the language in the InDesign paragraph style, so if you clear the overrides then it must-by-definition have the language you specified. You say it's not, so something is wrong with either your INDD files or your install of InDesign. I don't see any of the funky language-redefinition behavior when I place your Word file into ID. The Normal style declares it to be English - I clear overrides and the text gets marked with English.
If this happens to you in a new InDesign file, I'd say that you should try replacing your preferences, reinstalling, that kind of thing. If you are working with templates or re-using INDDs, you may try exporting to IDML and re-opening in CS5.5.