Fix `cache_translations` to work with new Parler
Fix `cache_translations` to work with new Parler

`cache_translations` had quietly broken when Parler was upgraded past
commit 601968c956c90e8bbc83d99cd87e18194790f2fb (Parler 1.2+), causing
caching to be done but Parler never knowing how to use the cached
translation data.

shoopio/shoop,suutari-ai/shoop,taedori81/shoop,hrayr-artunyan/shuup,shawnadelic/shuup,suutari/shoop,shawnadelic/shuup,akx/shoop,akx/shoop,jorge-marques/shoop,shoopio/shoop,suutari/shoop,hrayr-artunyan/shuup,taedori81/shoop,suutari-ai/shoop,taedori81/shoop,shawnadelic/shuup,akx/shoop,suutari/shoop,suutari-ai/shoop,shoopio/shoop,jorge-marques/shoop,hrayr-artunyan/shuup,jorge-marques/shoop