On a related note, I ran a number of comparisons similar to below(directly on the server where the db is located):
(after the initlal translation of course)
My early results show that the translated files take about 40 - 50% more time to load than the untranslated files, FYI.
On average we would see around 170ms for a typical "before" time and around 240 ms for a typical "after" time.
(and the file size change did not account for the difference).
Just FYI.