diff --git a/lisp/ox-latex.el b/lisp/ox-latex.el
index d30467aab..1b0fcb7c4 100644
--- a/lisp/ox-latex.el
+++ b/lisp/ox-latex.el
@@ -2451,7 +2451,7 @@ contextual information."
   (let ((code (org-element-property :value inline-src-block))
         (lang (org-element-property :language inline-src-block)))
     (pcase (plist-get info :latex-src-block-backend)
-      (`verbatim (org-latex--text-markup code 'code info))
+      ((or `verbatim (guard (not lang))) (org-latex--text-markup code 'code info))
       (`minted (org-latex-inline-src-block--minted info code lang))
       (`engraved (org-latex-inline-src-block--engraved info code lang))
       (`listings (org-latex-inline-src-block--listings info code lang))
diff --git a/lisp/ox-man.el b/lisp/ox-man.el
index 1f296baeb..5ef4dc63f 100644
--- a/lisp/ox-man.el
+++ b/lisp/ox-man.el
@@ -510,8 +510,9 @@ contextual information."
                         (expand-file-name "reshilite" tmpdir)))
              (org-lang (org-element-property :language inline-src-block))
              (lst-lang
-	      (cadr (assq (intern org-lang)
-			  (plist-get info :man-source-highlight-langs))))
+              (and org-lang
+	           (cadr (assq (intern org-lang)
+			       (plist-get info :man-source-highlight-langs)))))
 
              (cmd (concat (expand-file-name "source-highlight")
                           " -s " lst-lang
@@ -757,8 +758,9 @@ contextual information."
 	   (code (org-element-property :value src-block))
 	   (org-lang (org-element-property :language src-block))
 	   (lst-lang
-	    (cadr (assq (intern org-lang)
-			(plist-get info :man-source-highlight-langs))))
+            (and org-lang
+	         (cadr (assq (intern org-lang)
+			     (plist-get info :man-source-highlight-langs)))))
 	   (cmd (concat "source-highlight"
 			" -s " lst-lang
 			" -f groff_man "
diff --git a/lisp/ox-odt.el b/lisp/ox-odt.el
index f180660de..a7323c657 100644
--- a/lisp/ox-odt.el
+++ b/lisp/ox-odt.el
@@ -3111,7 +3111,7 @@ and prefix with \"OrgSrc\".  For example,
 (defun org-odt-do-format-code
     (code info &optional lang refs retain-labels num-start)
   (let* ((lang (or (assoc-default lang org-src-lang-modes) lang))
-	 (lang-mode (and lang (intern (format "%s-mode" lang))))
+	 (lang-mode (if lang (intern (format "%s-mode" lang)) #'ignore))
 	 (code-lines (org-split-string code "\n"))
 	 (code-length (length code-lines))
 	 (use-htmlfontify-p (and (functionp lang-mode)
diff --git a/lisp/ox-texinfo.el b/lisp/ox-texinfo.el
index ed2c3102e..bd01effaa 100644
--- a/lisp/ox-texinfo.el
+++ b/lisp/ox-texinfo.el
@@ -1681,8 +1681,9 @@ as a communication channel."
   "Transcode a SRC-BLOCK element from Org to Texinfo.
 CONTENTS holds the contents of the item.  INFO is a plist holding
 contextual information."
-  (let* ((lisp (string-match-p "lisp"
-			       (org-element-property :language src-block)))
+  (let* ((lisp (string-match-p
+                "lisp"
+		(or (org-element-property :language src-block) "")))
 	 (code (org-texinfo--sanitize-content
 		(org-export-format-code-default src-block info)))
 	 (value (format