Currently the script only updates

• src/locale/<locale>.ts
• src/locales/<locale>/index.ts
• src/locales/<locale>/<module>/index.ts
• src/locales/index.ts
• docs/api/localization.md

But it does not update

• src/locales/<locale>/<module>/<submodules...>/index.ts

We should probably add a test, that ensures we don't break it again.

To avoid stacking changes on top of each other, we should merge #478 first.

Detected in #484