Function updateLanguageTranslation

updateLanguageTranslation(
lng: LanguageOptionType,
userLangDict: Object,
): ExecutedResult
Updates the translations for the given language. For example:
```
updateLanguageTranslation("en-US", {
 key1: value1,
 key2: value2
})
```
Parameters
- lng: LanguageOptionType
  The target language.
- userLangDict: Object
  The new translation mapping.
Returns ExecutedResult