Nope, not possible – the code is located on a private, firewalled server (Windows and IIS, by demand by customer). But I might have a found a clue…
Been doing a bit of code reading during the night. Problem seems to be isolated to strings used by JavaScript (like ‘(City)’, ‘(Country)’, ‘Near me’ etc.) Strings used only in PHP code works flawlessly, and shows nicely in translated language.
Hope this helps a bit.