Original? You have clearly mentioned that these are language packs & for future use just rename those files with information you mentioned.
OK... IF these are original M$ files & just renamed then check file hash & Google that hash. You will definitely find real name.
I already did that, & I just found only one file: X16-37707.exe = fr_office_language_pack_2010_x86_518424.exe the rest still missing, that because these packages are not free, they are available only if you buy them.
Found this fr_office_language_pack_2007_x12-47256.iso (380MB) but not sure as the size of your file is different.
Sorry, hash is not the same. I have got this hash results: Code: MD5 : 415980B166FE4BC3C89849912B714AF1 SHA-1: 956FD9D7CFBB439E9CF568BF6030542101DBB9B9