diff --git a/sphinx/util/docutils.py b/sphinx/util/docutils.py
index c3d385306..39fa02d31 100644
--- a/sphinx/util/docutils.py
+++ b/sphinx/util/docutils.py
@@ -28,7 +28,7 @@ from docutils.utils import Reporter, unescape
 from packaging import version
 
 from sphinx.errors import SphinxError
-from sphinx.locale import _
+from sphinx.locale import _, __
 from sphinx.util import logging
 from sphinx.util.typing import RoleFunction
 
@@ -496,6 +496,9 @@ class SphinxTranslator(nodes.NodeVisitor):
         else:
             super().dispatch_departure(node)
 
+    def unknown_visit(self, node: Node) -> None:
+        logger.warning(__('unknown node type: %r'), node, location=node)
+
 
 # cache a vanilla instance of nodes.document
 # Used in new_document() function
diff --git a/sphinx/writers/html.py b/sphinx/writers/html.py
index fead4c61d..143c2ef71 100644
--- a/sphinx/writers/html.py
+++ b/sphinx/writers/html.py
@@ -876,9 +876,6 @@ class HTMLTranslator(SphinxTranslator, BaseTranslator):
         if depart:
             depart(self, node)
 
-    def unknown_visit(self, node: Node) -> None:
-        raise NotImplementedError('Unknown node: ' + node.__class__.__name__)
-
     @property
     def permalink_text(self) -> str:
         warnings.warn('HTMLTranslator.permalink_text is deprecated.',
diff --git a/sphinx/writers/html5.py b/sphinx/writers/html5.py
index bba07f447..adb463662 100644
--- a/sphinx/writers/html5.py
+++ b/sphinx/writers/html5.py
@@ -811,9 +811,6 @@ class HTML5Translator(SphinxTranslator, BaseTranslator):
         if depart:
             depart(self, node)
 
-    def unknown_visit(self, node: Node) -> None:
-        raise NotImplementedError('Unknown node: ' + node.__class__.__name__)
-
     @property
     def permalink_text(self) -> str:
         warnings.warn('HTMLTranslator.permalink_text is deprecated.',
diff --git a/sphinx/writers/latex.py b/sphinx/writers/latex.py
index 6f7e20241..d33f92dce 100644
--- a/sphinx/writers/latex.py
+++ b/sphinx/writers/latex.py
@@ -2077,9 +2077,6 @@ class LaTeXTranslator(SphinxTranslator):
     def depart_math_reference(self, node: Element) -> None:
         pass
 
-    def unknown_visit(self, node: Node) -> None:
-        raise NotImplementedError('Unknown node: ' + node.__class__.__name__)
-
 
 # FIXME: Workaround to avoid circular import
 # refs: https://github.com/sphinx-doc/sphinx/issues/5433
diff --git a/sphinx/writers/manpage.py b/sphinx/writers/manpage.py
index bcf4e98b3..3bcf650a7 100644
--- a/sphinx/writers/manpage.py
+++ b/sphinx/writers/manpage.py
@@ -11,7 +11,7 @@
 from typing import Any, Dict, Iterable, cast
 
 from docutils import nodes
-from docutils.nodes import Element, Node, TextElement
+from docutils.nodes import Element, TextElement
 from docutils.writers.manpage import Translator as BaseTranslator
 from docutils.writers.manpage import Writer
 
@@ -462,6 +462,3 @@ class ManualPageTranslator(SphinxTranslator, BaseTranslator):
 
     def depart_math_block(self, node: Element) -> None:
         self.depart_centered(node)
-
-    def unknown_visit(self, node: Node) -> None:
-        raise NotImplementedError('Unknown node: ' + node.__class__.__name__)
diff --git a/sphinx/writers/texinfo.py b/sphinx/writers/texinfo.py
index 9a281dc9a..c764b3027 100644
--- a/sphinx/writers/texinfo.py
+++ b/sphinx/writers/texinfo.py
@@ -1281,10 +1281,6 @@ class TexinfoTranslator(SphinxTranslator):
         logger.warning(__("unimplemented node type: %r"), node,
                        location=node)
 
-    def unknown_visit(self, node: Node) -> None:
-        logger.warning(__("unknown node type: %r"), node,
-                       location=node)
-
     def unknown_departure(self, node: Node) -> None:
         pass
 
diff --git a/sphinx/writers/text.py b/sphinx/writers/text.py
index ba310e072..e7ccf30b8 100644
--- a/sphinx/writers/text.py
+++ b/sphinx/writers/text.py
@@ -16,7 +16,7 @@ from typing import (TYPE_CHECKING, Any, Dict, Generator, Iterable, List, Optiona
                     Union, cast)
 
 from docutils import nodes, writers
-from docutils.nodes import Element, Node, Text
+from docutils.nodes import Element, Text
 from docutils.utils import column_width
 
 from sphinx import addnodes
@@ -1189,6 +1189,3 @@ class TextTranslator(SphinxTranslator):
 
     def depart_math_block(self, node: Element) -> None:
         self.end_state()
-
-    def unknown_visit(self, node: Node) -> None:
-        raise NotImplementedError('Unknown node: ' + node.__class__.__name__)