I may be missing something, but is there no other way than to manually tell XI to translate a bunch of items, even with all the mods that are available, one has to type /translate "M. Silverpiece" E>J and add it to the dictionary each log?
If you have one in your inventory or can look at one in a bazaar, highlight it then bring up chat and press Tab x2 (iirc). It should automatically bring it up into auto-translate.
It may take a double tab then a back out of auto-translate and from there you can start typing it exactly as it is in the inventory and press tab to bring it up in auto-translate.
Can't remember which way does it, but if you have no way of seeing one in an inventory/bazaar then yeah you have to do the /translate ***.