Some background: This is a conlang that I'm developing as part of my job. It's a difficult task, but I want to make it as realistic as possible. I have to make a detailed grammar so that other linguists can write dialog for characters. Obviously, I can't foresee everything, so I'd like to base the details of this language in existing ones.
This is a highly agglutinative language with derivational and inflectional suffixes, perhaps like Quechua. It has case. There are no prepositions.
The word 'about' should be a suffix too, but I don't see any reference for such a suffix in the literature. Here are some sentences I'd like to be able to gloss in the grammar:
3SG.PRES-be joke dog-about
`it is a joke about dogs’
1SG.FUT-tell you-DAT tooth-about
‘I will tell you about a tooth.’
I know you can’t just tell me how to categorise this suffix, but any input would be helpful. For one thing, I’m not sure if it’s best classified as inflectional or derivational. Also, I cannot really think of a good gloss.