This pull request updates translations to languages being tracked from
Crowdin.

Co-authored-by: GitHub Actions <github-actions@github.com>

Merged translations from Crowdin

Spawned from #19740 

### Summary of the issue:
It was hard to track all the different places language codes are
normalized in NVDA.

### Description of developer facing changes:


This pull request standardizes language code formatting across the NVDA
codebase by introducing and using the `toXmlLang` and `toNvdaLang`
utility functions from `speechXml`. This ensures consistent handling of
language codes (e.g., converting between underscores and hyphens) when
interacting with speech synthesis engines and related components.


### Description of development approach:
Replaced manual string manipulation for language codes (such as
`replace("_", "-")` or `replace("-", "_")`) with the use of `toXmlLang`
and `toNvdaLang` utility functions in `speech.py`, `_espeak.py`,
`espeak.py`, and `oneCore.py` to ensure consistent formatting for speech
engine interoperability.

This pull request refactors type annotations and import statements in
`source/gui/settingsDialogs.py` to use modern Python type hinting syntax
and improve import organization. The changes primarily involve replacing
`typing` module type hints with built-in generic types, as well as
reordering some import statements for clarity.