Occitan-lengadocian's project

Hi all,

I test the language pack oc, 
OOo_OOO330m7_Win_x86_langpack_en-US_nb_nl_oc_om_or_pl_pt-BR_pt_ru.exe. 
It works without any problem but I should like know what is the use of 
this files L10n TCM in Pootle. I think it is for tests no ? But where 
may  I find some explanations about L10n TCM 's files and the way to use it?

Thanks a lot,
Bruno