Couldn't run it on KDE Plasma due to a missing dependency:

  File "/usr/bin/dialect", line 38, in <module>
    from dialect import main
  File "/usr/share/dialect/dialect/main.py", line 21, in <module>
    gi.require_version("Spelling", "1")
    ~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
  File "/usr/lib64/python3.14/site-packages/gi/__init__.py", line 132, in require_version
    raise ValueError(f"Namespace {namespace} not available")
ValueError: Namespace Spelling not available

See https://github.com/dialect-app/dialect/blob/93958c0202d8ef1d41dc5d27c2b1727cb476f3f0/dialect/main.py#L21-L22.

Adding these runtime dependencies fixes the problem:

Requires:       libspelling
Requires:       gtksourceview5