Td: Translation Platform and custom languages

[RadRussianRus]

Telegram now supports custom languages from Translation Platform. TDLib for now doesn't support it.

[zevlg]

It does actually.

You just need to set "localization_target" option (with setOption) and then request strings of any available language pack, using getLanguagePackStrings, for example:

{"@type": "getLanguagePackStrings", "language_pack_id": "ru", "keys": []}

[levlam]

@RadRussianRus Support for unofficial language packs, available on Translation Platform, will be added to next TDLib version along with other new features.

[levlam]

Support for custom language packs downloaded from the server was added in TDLib 1.4.0. See Change Log for the full list of changes.