english clientside translation will use .lub files & no need to worry.. the client also with read lub files.. unless u patch the client to read lua files...
for example, in nemo patcher u can find load custom lua files instead of lub.. unless if can patch to read lua files, or otherwise the client will read lub files i guess..
i'm not sure about other load lua files in nemo patcher, but if for itemInfo.lua, below link might help u.