Improve docutils LanguageImporter's (#14130)

Author: donBarbos

stubs/docutils/docutils/languages/__init__.pyi

@@ -16,7 +16,7 @@ class LanguageImporter:
     fallback: ClassVar[str]
     cache: dict[str, _LanguageModule]
     def __init__(self) -> None: ...
-    def import_from_packages(self, name: str, reporter: Reporter | None = None): ...
+    def import_from_packages(self, name: str, reporter: Reporter | None = None) -> _LanguageModule: ...
     def check_content(self, module: _LanguageModule) -> None: ...
     def __call__(self, language_code: str, reporter: Reporter | None = None) -> _LanguageModule: ...
 

stubs/docutils/docutils/parsers/rst/languages/__init__.pyi

@@ -1,6 +1,7 @@
 from typing import ClassVar, Final, Protocol, type_check_only
 
 from docutils.languages import LanguageImporter
+from docutils.utils import Reporter
 
 __docformat__: Final = "reStructuredText"
 
@@ -10,7 +11,10 @@ class _RstLanguageModule(Protocol):
     roles: dict[str, str]
 
 class RstLanguageImporter(LanguageImporter):
+    cache: dict[str, _RstLanguageModule]  # type: ignore[assignment]
     fallback: ClassVar[None]  # type: ignore[assignment]
+    def import_from_packages(self, name: str, reporter: Reporter | None = None) -> _RstLanguageModule: ...  # type: ignore[override]
     def check_content(self, module: _RstLanguageModule) -> None: ...  # type: ignore[override]
+    def __call__(self, language_code: str, reporter: Reporter | None = None) -> _RstLanguageModule: ...  # type: ignore[override]
 
 get_language: RstLanguageImporter