diff --git a/Makefile.gc b/Makefile.gc
index 29bc982..c2ae480 100644
--- a/Makefile.gc
+++ b/Makefile.gc
@@ -23,14 +23,18 @@ SOURCES		:=	source source/boards source/mappers source/input \
 			source/drivers/gamecube source/roms \
 			source/iplfont source/sz
 DATA		:=	data  
-INCLUDES	:=	source/sz
+INCLUDES	:=	source source/sz
+# Specify language in all capitals
+# Supported languages: ENGLISH
+LANG		:=	ENGLISH
 
 #---------------------------------------------------------------------------------
 # options for code generation
 #---------------------------------------------------------------------------------
 CFLAGS  = -g -Os -Wall $(MACHDEP) $(INCLUDE) -DFCEU_VERSION_NUMERIC=9812 -DNGC=1 \
 		-DZLIB -DBIG_ENDIAN -DHAVE_ASPRINTF=1 -DSTDC \
-	    -D_SZ_ONE_DIRECTORY=1 -D_LZMA_IN_CB=1 -D_LZMA_OUT_READ
+	    -D_SZ_ONE_DIRECTORY=1 -D_LZMA_IN_CB=1 -D_LZMA_OUT_READ \
+	    -DINTL_$(LANG)
 CXXFLAGS	=	$(CFLAGS)
 
 LDFLAGS	=	-g $(MACHDEP) -Wl,-Map,$(notdir $@).map -Wl,--cref
diff --git a/Makefile.wii b/Makefile.wii
index 8ebba42..56691a7 100644
--- a/Makefile.wii
+++ b/Makefile.wii
@@ -23,7 +23,10 @@ SOURCES		:=	source source/boards source/mappers source/input \
 			source/drivers/gamecube source/roms \
 			source/iplfont source/sz source/drivers/gamecube/wiisd
 DATA		:=	data  
-INCLUDES	:=	source/sz source/drivers/gamecube/wiisd
+INCLUDES	:=	source source/sz source/drivers/gamecube/wiisd
+# Specify language in all capitals
+# Supported languages: ENGLISH
+LANG		:=	ENGLISH
 
 #---------------------------------------------------------------------------------
 # options for code generation
@@ -32,7 +35,8 @@ INCLUDES	:=	source/sz source/drivers/gamecube/wiisd
 #CFLAGS	= -g -O2 -Wall $(MACHDEP) $(INCLUDE) -DFCEU_VERSION_NUMERIC=9812 -DNGC=1 -DZLIB -DBIG_ENDIAN -DHAVE_ASPRINTF=1 -DSTDC -D_SZ_ONE_DIRECTORY=1 -D_LZMA_IN_CB=1 -D_LZMA_OUT_READ
 CFLAGS  = -g -Os -Wall $(MACHDEP) $(INCLUDE) -DFCEU_VERSION_NUMERIC=9812 -DNGC=1 \
 		-DZLIB -DBIG_ENDIAN -DHAVE_ASPRINTF=1 -DSTDC \
-	    -D_SZ_ONE_DIRECTORY=1 -D_LZMA_IN_CB=1 -D_LZMA_OUT_READ
+	    -D_SZ_ONE_DIRECTORY=1 -D_LZMA_IN_CB=1 -D_LZMA_OUT_READ \
+	    -DINTL_$(LANG)
 CXXFLAGS	=	$(CFLAGS)
 
 LDFLAGS	=	-g $(MACHDEP) -Wl,-Map,$(notdir $@).map -Wl,--cref