Anyone know if you need a specific custom pack when flashing the W995?

I am going to flash it with:

W995_R1HA036_FS_C-ASIA_RED53
W995_R1HA036_MAIN_GENERIC_HI_RED53

In the download section for the W995 there are two custom packs (Turkey and Greece). I gather however I can use a English C905 one, however is there a specific one I need to use in conjunction with the MAIN & FS Files? cheers