diff --git a/sphinx/builders/html/__init__.py b/sphinx/builders/html/__init__.py
index a62e46b43..7244a3c4e 100644
--- a/sphinx/builders/html/__init__.py
+++ b/sphinx/builders/html/__init__.py
@@ -1140,7 +1140,7 @@ def convert_html_js_files(app: Sphinx, config: Config) -> None:
     config.html_js_files = html_js_files  # type: ignore
 
 
-def setup_js_tag_helper(app: Sphinx, pagename: str, templatexname: str,
+def setup_js_tag_helper(app: Sphinx, pagename: str, templatename: str,
                         context: Dict, doctree: Node) -> None:
     """Set up js_tag() template helper.
 
diff --git a/sphinx/util/i18n.py b/sphinx/util/i18n.py
index d647d6d05..1e469d135 100644
--- a/sphinx/util/i18n.py
+++ b/sphinx/util/i18n.py
@@ -116,11 +116,11 @@ class CatalogRepository:
             yield CatalogInfo(basedir, domain, self.encoding)
 
 
-def docname_to_domain(docname: str, compation: Union[bool, str]) -> str:
+def docname_to_domain(docname: str, compaction: Union[bool, str]) -> str:
     """Convert docname to domain for catalogs."""
-    if isinstance(compation, str):
-        return compation
-    if compation:
+    if isinstance(compaction, str):
+        return compaction
+    if compaction:
         return docname.split(SEP, 1)[0]
     else:
         return docname