- Add input param for ignoring certain files
- Ignore non-versioned files?
- Add param for writing fixes to input files (e.g. sorting translations)
- Resource main language key (e.g. 'en') must match the file name?
- Can a single file keep multiple translations?
- Add 'fail-fast' option (fail at first error found)
- check whether there are duplicated keys in the same json file
- overwrite the original .json files, sorting translations
- fail when an empty translation is found
- check for translation params (using same var names in all languages)