[REQ] Translatable language files

[FrankDRNS]

I'm not 100% sure if this is the right subforum, but seeing as the language file is closely related to autoprovisioning this seemed like the best spot.

We want to translate the hardphone's menus and everything from English into Dutch, however it seems I'm not able to extract the original .txt files from the phone somehow.

Does anyone know how to get them, or can Yealink provide these directly perhaps? We need the original English language files for the T41P and T46G to begin with. Perhaps also the W52 handset.

FYI, I'm talking about the following provisioning option:
gui_lang.url = http://foo.bar/lang-Dutch.txt

I'm aware there's a Dutch distributor of Yealink who modify the actual firmware to contain Dutch menus et al. But when we want to update a phone (e.g. as a test) we'd always have to go through the distributor as Yealink themselves don't offer this Dutch version. This would mean a simple firmware upgrade might take much longer due to having to wait for firmwares to be made available to us.