Again, spellcheck and hyphenation not working after installing a new language

I reported this in 2023 and 2024. Here we are again. Creating a new language deactivates spellcheck and hyphenation features.

We could have more languages in InDesign, given that there are Hunspell packages available. For instance, in Spain we could add Basque, Galician. Many countries in South America could install variants of Spanish (for Argentina, Mexico, etc.).

Resetting preferences and deleting caches is of no avail. The only solution is reinstalling InDesign from scratch.

We are stuck with the list of languages installed by default. Please, give us a more language-aware application, because we need to work with other languages than those installed by default.