There is not enough free space on the APIM to install the files.
FILES (2)
5U5T-14G391-BS_1660772122000.TAR.GZ (1,4GB)
NU5T-14G381-AA_1660780450000.TAR.GZ (869,8MB)
Total file size COMPRESSED: 2.27GB
x 1.6 =
Total File size UNCOMPRESSED: 3.63GB
Available free space on the APIM: /fs/images/ = 2.6G / 3.0G
You will need to use a language file that is smaller in size with the desired language included. Since your region is ANZ, if you only need Spanish, you could use 5U5T-14G391-CS, 386Mb (ENU, FRC, SPM).
Also, you did not indicate the model year of your Fiesta, but being NON-NAV, I recommend you go to Sync 3.4.21265 with the appropriate voice file. The newer versions have issues with compass and time that 21265 does not.