Use espeak_ng_PrintStatusCodeMessage for espeak_ng_Initialize error formatting.

src/espeak-ng.c

 	espeak_ng_InitializePath(data_path);
 	espeak_ng_STATUS result = espeak_ng_Initialize();
 	if (result != ENS_OK) {
-		if (result == ENS_VERSION_MISMATCH)
-			fprintf(stderr, "Wrong version of espeak-data\n");
-		else
-			fprintf(stderr, "Failed to load espeak-data\n");
+		espeak_ng_PrintStatusCodeMessage(result, stderr);
 		exit(1);
 	}
 

src/libespeak-ng/espeak_api.c

 	espeak_ng_InitializePath(path);
 	espeak_ng_STATUS result = espeak_ng_Initialize();
 	if (result != ENS_OK) {
-		if (result == ENS_VERSION_MISMATCH)
-			fprintf(stderr, "Wrong version of espeak-data\n");
-		else {
-			fprintf(stderr, "Failed to load espeak-data\n");
-			if ((options & espeakINITIALIZE_DONT_EXIT) == 0)
-				exit(1);
-		}
+		espeak_ng_PrintStatusCodeMessage(result, stderr);
+		if ((options & espeakINITIALIZE_DONT_EXIT) == 0)
+			exit(1);
 	}
 
 	switch (output_type)

src/speak-ng.c

 	espeak_ng_InitializePath(data_path);
 	espeak_ng_STATUS result = espeak_ng_Initialize();
 	if (result != ENS_OK) {
-		if (result == ENS_VERSION_MISMATCH)
-			fprintf(stderr, "Wrong version of espeak-data (expected 0x%x) at %s\n", version_phdata, path_home);
-		else
-			fprintf(stderr, "Failed to load espeak-data\n");
+		espeak_ng_PrintStatusCodeMessage(result, stderr);
 		exit(1);
 	}