Brief summary of issue / Description of requested feature:

Currently, texts are duplicated in json and lua files, but should not.

Steps to reproduce the issue / Reasons for adding feature:

1. Adjustable Container localisation
2. Mudlet localisation in Other.lua
3. translations/mudlet-lua.json

Error output / Expected result of feature

Keep texts in one place only.

Extra information, such as Mudlet version, operating system and ideas for how to solve / implement:

#4418 (comment)