diff --git a/lldb/include/lldb/lldb-enumerations.h b/lldb/include/lldb/lldb-enumerations.h
--- a/lldb/include/lldb/lldb-enumerations.h
+++ b/lldb/include/lldb/lldb-enumerations.h
@@ -490,16 +490,16 @@
   eLanguageTypeFortran18 = 0x002d,
   eLanguageTypeAda2005 = 0x002e,
   eLanguageTypeAda2012 = 0x002f,
+  eLanguageTypeMojo = 0x0033,
 
   // Vendor Extensions
   // Note: Language::GetNameForLanguageType
   // assumes these can be used as indexes into array language_names, and
   // Language::SetLanguageFromCString and Language::AsCString assume these can
   // be used as indexes into array g_languages.
-  eLanguageTypeMipsAssembler,           ///< Mips_Assembler.
+  eLanguageTypeMipsAssembler, ///< Mips_Assembler.
   // Mojo will move to the common list of languages once the DWARF committee
   // creates a language code for it.
-  eLanguageTypeMojo,
   eNumLanguageTypes
 };
 
diff --git a/lldb/source/Target/Language.cpp b/lldb/source/Target/Language.cpp
--- a/lldb/source/Target/Language.cpp
+++ b/lldb/source/Target/Language.cpp
@@ -209,9 +209,9 @@
     {"fortran18", eLanguageTypeFortran18},
     {"ada2005", eLanguageTypeAda2005},
     {"ada2012", eLanguageTypeAda2012},
+    {"mojo", eLanguageTypeMojo},
     // Vendor Extensions
     {"assembler", eLanguageTypeMipsAssembler},
-    {"mojo", eLanguageTypeMojo},
     // Now synonyms, in arbitrary order
     {"objc", eLanguageTypeObjC},
     {"objc++", eLanguageTypeObjC_plus_plus},
@@ -457,12 +457,12 @@
   return std::pair<llvm::StringRef, llvm::StringRef>();
 }
 
-bool Language::DemangledNameContainsPath(llvm::StringRef path, 
+bool Language::DemangledNameContainsPath(llvm::StringRef path,
                                          ConstString demangled) const {
   // The base implementation does a simple contains comparision:
   if (path.empty())
     return false;
-  return demangled.GetStringRef().contains(path);                                         
+  return demangled.GetStringRef().contains(path);
 }
 
 DumpValueObjectOptions::DeclPrintingHelper Language::GetDeclPrintingHelper() {
diff --git a/llvm/include/llvm-c/DebugInfo.h b/llvm/include/llvm-c/DebugInfo.h
--- a/llvm/include/llvm-c/DebugInfo.h
+++ b/llvm/include/llvm-c/DebugInfo.h
@@ -125,6 +125,7 @@
   LLVMDWARFSourceLanguageFortran18,
   LLVMDWARFSourceLanguageAda2005,
   LLVMDWARFSourceLanguageAda2012,
+  LLVMDWARFSourceLanguageMojo,
   // Vendor extensions:
   LLVMDWARFSourceLanguageMips_Assembler,
   LLVMDWARFSourceLanguageGOOGLE_RenderScript,
diff --git a/llvm/include/llvm/BinaryFormat/Dwarf.h b/llvm/include/llvm/BinaryFormat/Dwarf.h
--- a/llvm/include/llvm/BinaryFormat/Dwarf.h
+++ b/llvm/include/llvm/BinaryFormat/Dwarf.h
@@ -268,6 +268,7 @@
   case DW_LANG_Fortran18:
   case DW_LANG_Ada2005:
   case DW_LANG_Ada2012:
+  case DW_LANG_Mojo:
     result = false;
     break;
   }
@@ -334,6 +335,7 @@
   case DW_LANG_C17:
   case DW_LANG_Ada2005:
   case DW_LANG_Ada2012:
+  case DW_LANG_Mojo:
     result = false;
     break;
   }
@@ -398,6 +400,7 @@
   case DW_LANG_Fortran18:
   case DW_LANG_Ada2005:
   case DW_LANG_Ada2012:
+  case DW_LANG_Mojo:
     return false;
   }
   llvm_unreachable("Unknown language kind.");
diff --git a/llvm/include/llvm/BinaryFormat/Dwarf.def b/llvm/include/llvm/BinaryFormat/Dwarf.def
--- a/llvm/include/llvm/BinaryFormat/Dwarf.def
+++ b/llvm/include/llvm/BinaryFormat/Dwarf.def
@@ -948,6 +948,7 @@
 HANDLE_DW_LANG(0x002d, Fortran18, 0, 0, DWARF)
 HANDLE_DW_LANG(0x002e, Ada2005, 0, 0, DWARF)
 HANDLE_DW_LANG(0x002f, Ada2012, 0, 0, DWARF)
+HANDLE_DW_LANG(0x0033, Mojo, 0, 0, DWARF)
 // Vendor extensions:
 HANDLE_DW_LANG(0x8001, Mips_Assembler, std::nullopt, 0, MIPS)
 HANDLE_DW_LANG(0x8e57, GOOGLE_RenderScript, 0, 0, GOOGLE)
diff --git a/llvm/lib/IR/DIBuilder.cpp b/llvm/lib/IR/DIBuilder.cpp
--- a/llvm/lib/IR/DIBuilder.cpp
+++ b/llvm/lib/IR/DIBuilder.cpp
@@ -140,7 +140,7 @@
     DICompileUnit::DebugNameTableKind NameTableKind, bool RangesBaseAddress,
     StringRef SysRoot, StringRef SDK) {
 
-  assert(((Lang <= dwarf::DW_LANG_Ada2012 && Lang >= dwarf::DW_LANG_C89) ||
+  assert(((Lang <= dwarf::DW_LANG_Mojo && Lang >= dwarf::DW_LANG_C89) ||
           (Lang <= dwarf::DW_LANG_hi_user && Lang >= dwarf::DW_LANG_lo_user)) &&
          "Invalid Language tag");