diff --git a/Firmware/Marlin.h b/Firmware/Marlin.h
index 08cfae29..3694df28 100644
--- a/Firmware/Marlin.h
+++ b/Firmware/Marlin.h
@@ -50,7 +50,7 @@
 #define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
 #endif
 
-#include "WString.h"
+//#include "WString.h"
 
 #ifdef AT90USB
    #ifdef BTENABLED
diff --git a/Firmware/Marlin_main.cpp b/Firmware/Marlin_main.cpp
index 4d3cb9e8..7cab97eb 100644
--- a/Firmware/Marlin_main.cpp
+++ b/Firmware/Marlin_main.cpp
@@ -996,35 +996,95 @@ void erase_eeprom_section(uint16_t offset, uint16_t bytes)
 
 #include "bootapp.h"
 
-void __test()
+void __test(uint8_t lang)
 {
+	uint8_t cnt = lang_get_count();
+	printf_P(PSTR("cnt=%d lang=%d\n"), cnt, lang);
+	if ((lang < 2) || (lang > cnt)) return;
+
 	cli();
-	boot_app_magic = 0x55aa55aa;
+	boot_app_magic = BOOT_APP_MAGIC;
 	boot_app_flags = BOOT_APP_FLG_USER0;
-	boot_reserved = 0x00;
+	boot_reserved = lang << 4;
 	wdt_enable(WDTO_15MS);
 	while(1);
 }
 
 #ifdef W25X20CL
 
+#define W25X20CL_BLOCK 1024
+
 void upgrade_sec_lang_from_external_flash()
 {
-	if ((boot_app_magic == 0x55aa55aa) && (boot_app_flags & BOOT_APP_FLG_USER0))
+	if ((boot_app_magic == BOOT_APP_MAGIC) && (boot_app_flags & BOOT_APP_FLG_USER0))
 	{
-		fprintf_P(lcdout, PSTR(ESC_2J ESC_H(1,1) "TEST %d"), boot_reserved);
-		boot_reserved++;
-		if (boot_reserved < 4)
+		uint8_t lang = boot_reserved >> 4;
+		uint8_t state = boot_reserved & 0xf;
+
+		fprintf_P(lcdout, PSTR(ESC_H(1,3) "lang=%1hhd state=%1hhx"), lang, state);
+		delay(1000);
+		state++;
+		boot_reserved = state | (lang << 4);
+		if (state < 15)
 		{
-			_delay_ms(1000);
 			cli();
 			wdt_enable(WDTO_15MS);
 			while(1);
 		}
+/*		fprintf_P(lcdout, PSTR(ESC_2J "UPGRADE START"));
+		delay(1000);
+		fprintf_P(lcdout, PSTR(ESC_H(1,1) "lang=%hhd state=%hhd"), lang, state);
+		delay(1000);*/
+/*
+		lang_table_header_t header;
+		uint32_t src_addr = 0x00000;
+		if (lang_get_header(lang, &header, &src_addr))
+		{
+			uint16_t dst_addr = ((((uint16_t)&_SEC_LANG) + 0x00ff) & 0xff00); //table pointer
+			uint16_t size = W25X20CL_BLOCK * state;
+			src_addr += size;
+			dst_addr += size;
+			state++;
+			boot_reserved = state | (lang << 4);
+			if (size < header.size)
+			{
+				fprintf_P(lcdout, PSTR(ESC_2J ESC_H(1,0) "Copying lang #%hhd" ESC_H(1,1) "size 0x%04x"), lang, size);
+				size = header.size - size;
+				if (size > W25X20CL_BLOCK) size = W25X20CL_BLOCK;
+
+//				delay(1000);
+//				cli();
+//				wdt_enable(WDTO_15MS);
+//				while(1);
+				cli();
+				w25x20cl_rd_data(src_addr, (uint8_t*)0x0800, 256);
+				bootapp_ram2flash(0x0800, dst_addr, 256);
+			}
+*/
+/*
+
+				
+				
+//				header.size - (4096*state);
+
+			fprintf_P(lcdout, PSTR(ESC_2J ESC_H(1,0) "Copying lang #%hhd" ESC_H(1,1) "state %hhd" ESC_H(1,2) "offs: %08lx" ESC_H(1,3) "remain %04x"), lang, state, offset, remain);
+			state++;
+			boot_reserved = state | (lang << 4);
+			if (state < 4)
+			{
+				_delay_ms(1000);
+				cli();
+				wdt_enable(WDTO_15MS);
+				while(1);
+			}*/
+//		}
 	}
 	boot_app_flags &= ~BOOT_APP_FLG_USER0;
 }
 
+
+#ifdef DEBUG_W25X20CL
+
 uint8_t lang_xflash_enum_codes(uint16_t* codes)
 {
 	lang_table_header_t header;
@@ -1044,7 +1104,7 @@ uint8_t lang_xflash_enum_codes(uint16_t* codes)
 		printf_P(_n(" _lt_size         = 0x%04x (%d)\n"), header.size, header.size);
 		printf_P(_n(" _lt_count        = 0x%04x (%d)\n"), header.count, header.count);
 		printf_P(_n(" _lt_chsum        = 0x%04x\n"), header.checksum);
-		printf_P(_n(" _lt_code         = 0x%04x\n"), header.code);
+		printf_P(_n(" _lt_code         = 0x%04x (%c%c)\n"), header.code, header.code >> 8, header.code & 0xff);
 		printf_P(_n(" _lt_resv1        = 0x%08lx\n"), header.reserved1);
 
 		addr += header.size;
@@ -1061,6 +1121,8 @@ void list_sec_lang_from_external_flash()
 	printf_P(_n("XFlash lang count = %hhd\n"), count);
 }
 
+#endif //DEBUG_W25X20CL
+
 #endif //W25X20CL
 
 
@@ -1069,16 +1131,20 @@ void list_sec_lang_from_external_flash()
 // are initialized by the main() routine provided by the Arduino framework.
 void setup()
 {
+    lcd_init();
+	fdev_setup_stream(lcdout, lcd_putchar, NULL, _FDEV_SETUP_WRITE); //setup lcdout stream
+
 #ifdef NEW_SPI
 	spi_init();
 #endif //NEW_SPI
 
-    lcd_init();
-	fdev_setup_stream(lcdout, lcd_putchar, NULL, _FDEV_SETUP_WRITE); //setup lcdout stream
-
-	upgrade_sec_lang_from_external_flash();
-
 	lcd_splash();
+
+	if (w25x20cl_init())
+		upgrade_sec_lang_from_external_flash();
+	else
+		kill(_i("External SPI flash W25X20CL not responding."));
+
 	setup_killpin();
 	setup_powerhold();
 
@@ -1369,21 +1435,17 @@ void setup()
   // If they differ, an update procedure may need to be performed. At the end of this block, the current firmware version
   // is being written into the EEPROM, so the update procedure will be triggered only once.
 
-	spi_setup(TMC2130_SPCR, TMC2130_SPSR);
-	puts_P(_n("w25x20cl init: "));
-	if (w25x20cl_ini())
-	{
-		uint8_t uid[8]; // 64bit unique id
-		w25x20cl_rd_uid(uid);
-		puts_P(_n("OK, UID="));
-		for (uint8_t i = 0; i < 8; i ++)
-			printf_P(PSTR("%02hhx"), uid[i]);
-		putchar('\n');
-		list_sec_lang_from_external_flash();
-	}
-	else
-		puts_P(_n("NG!\n"));
 
+#ifdef DEBUG_W25X20CL
+	W25X20CL_SPI_ENTER();
+	uint8_t uid[8]; // 64bit unique id
+	w25x20cl_rd_uid(uid);
+	puts_P(_n("W25X20CL UID="));
+	for (uint8_t i = 0; i < 8; i ++)
+		printf_P(PSTR("%02hhx"), uid[i]);
+	putchar('\n');
+	list_sec_lang_from_external_flash();
+#endif //DEBUG_W25X20CL
 
 	lang_selected = eeprom_read_byte((uint8_t*)EEPROM_LANG);
 	if (lang_selected >= LANG_NUM)
@@ -1393,12 +1455,13 @@ void setup()
 	}
 	lang_select(lang_selected);
 
+//#ifdef DEBUG_SEC_LANG
+
 	uint16_t sec_lang_code = lang_get_code(1);
 	printf_P(_n("SEC_LANG_CODE=0x%04x (%c%c)\n"), sec_lang_code, sec_lang_code >> 8, sec_lang_code & 0xff);
 
-#ifdef DEBUG_SEC_LANG
-	lang_print_sec_lang(uartout);
-#endif //DEBUG_SEC_LANG
+//	lang_print_sec_lang(uartout);
+//#endif //DEBUG_SEC_LANG
 	
 	if (eeprom_read_byte((uint8_t*)EEPROM_TEMP_CAL_ACTIVE) == 255) {
 		eeprom_write_byte((uint8_t*)EEPROM_TEMP_CAL_ACTIVE, 0);
@@ -2224,7 +2287,7 @@ void homeaxis(int axis, uint8_t cnt, uint8_t* pstep)
 #ifdef TMC2130
 		if (READ(Z_TMC2130_DIAG) != 0) { //Z crash
 			FORCE_HIGH_POWER_END;
-			kill(MSG_BED_LEVELING_FAILED_POINT_LOW);
+			kill(_T(MSG_BED_LEVELING_FAILED_POINT_LOW));
 			return; 
 		}
 #endif //TMC2130
@@ -2240,7 +2303,7 @@ void homeaxis(int axis, uint8_t cnt, uint8_t* pstep)
 #ifdef TMC2130
 		if (READ(Z_TMC2130_DIAG) != 0) { //Z crash
 			FORCE_HIGH_POWER_END;
-			kill(MSG_BED_LEVELING_FAILED_POINT_LOW);
+			kill(_T(MSG_BED_LEVELING_FAILED_POINT_LOW));
 			return; 
 		}
 #endif //TMC2130
@@ -5004,7 +5067,7 @@ Sigma_Exit:
       setWatch();
       break;
     case 112: //  M112 -Emergency Stop
-      kill("", 3);
+      kill(_n(""), 3);
       break;
     case 140: // M140 set bed temp
       if (code_seen('S')) setTargetBed(code_value());
@@ -7387,7 +7450,7 @@ void manage_inactivity(bool ignore_stepper_queue/*=false*/) //default argument s
 
   if( (millis() - previous_millis_cmd) >  max_inactive_time )
     if(max_inactive_time)
-      kill("", 4);
+      kill(_n(""), 4);
   if(stepper_inactive_time)  {
     if( (millis() - previous_millis_cmd) >  stepper_inactive_time )
     {
diff --git a/Firmware/bootapp.c b/Firmware/bootapp.c
index 00d31248..8eb5b52d 100644
--- a/Firmware/bootapp.c
+++ b/Firmware/bootapp.c
@@ -20,12 +20,12 @@ void bootapp_print_vars()
 void bootapp_ram2flash(uint16_t rptr, uint16_t fptr, uint16_t size)
 {
 	cli();
-	boot_app_magic = 0x55aa55aa;
+	boot_app_magic = BOOT_APP_MAGIC;
 	boot_app_flags |= BOOT_APP_FLG_COPY;
 	uint16_t ui; for (ui = 0; ui < size; ui++)
 	{
 		uint8_t uc = ram_array[ui+rptr];
-		if (pgm_readbyte(ui+fptr) & uc != uc)
+		if (pgm_read_byte(ui+fptr) & uc != uc)
 		{
 			boot_app_flags |= BOOT_APP_FLG_ERASE;
 			break;
diff --git a/Firmware/bootapp.h b/Firmware/bootapp.h
index dc0006e4..3d6d521f 100644
--- a/Firmware/bootapp.h
+++ b/Firmware/bootapp.h
@@ -20,6 +20,8 @@
 
 #define BOOT_APP_FLG_USER0 0x80
 
+#define BOOT_APP_MAGIC 0x55aa55aa
+
 
 #if defined(__cplusplus)
 extern "C" {
diff --git a/Firmware/config.h b/Firmware/config.h
index 9902349f..a9172429 100644
--- a/Firmware/config.h
+++ b/Firmware/config.h
@@ -19,7 +19,12 @@
 #define TMC2130_SPSR           SPI_SPSR(TMC2130_SPI_RATE)
 
 //W25X20CL configuration
+//pinout:
 #define W25X20CL_PIN_CS        32
+//spi:
+#define W25X20CL_SPI_RATE      0 // fosc/4 = 4MHz
+#define W25X20CL_SPCR          SPI_SPCR(W25X20CL_SPI_RATE, 1, 1, 1, 0)
+#define W25X20CL_SPSR          SPI_SPSR(W25X20CL_SPI_RATE)
 
 //LANG - Multi-language support
 //#define LANG_MODE               0 // primary language only
diff --git a/Firmware/language.c b/Firmware/language.c
index 3c068b14..e83f7edf 100644
--- a/Firmware/language.c
+++ b/Firmware/language.c
@@ -97,10 +97,36 @@ uint8_t lang_get_count()
 #endif //W25X20CL
 }
 
+uint8_t lang_get_header(uint8_t lang, lang_table_header_t* header, uint32_t* offset)
+{
+	if (lang == LANG_ID_PRI) return 0; //primary lang not supported for this function
+#ifdef W25X20CL
+	if (lang == LANG_ID_SEC)
+	{
+		uint16_t ui = ((((uint16_t)&_SEC_LANG) + 0x00ff) & 0xff00); //table pointer
+		memcpy_P(header, ui, sizeof(lang_table_header_t)); //read table header from progmem
+		if (offset) *offset = ui;
+		return (header == LANG_MAGIC)?1:0; //return 1 if magic valid
+	}
+	uint32_t addr = 0x00000; //start of xflash
+	lang--;
+	while (1)
+	{
+		w25x20cl_rd_data(addr, header, sizeof(lang_table_header_t)); //read table header from xflash
+		if (header->magic != LANG_MAGIC) break; //break if not valid
+		if (offset) *offset = addr;
+		if (--lang == 0) return 1;
+		addr += header->size; //calc address of next table
+	}
+	return 0;
+#else //W25X20CL
+#endif //W25X20CL
+}
+
 uint16_t lang_get_code(uint8_t lang)
 {
-#ifdef W25X20CL
 	if (lang == LANG_ID_PRI) return LANG_CODE_EN; //primary lang = EN
+#ifdef W25X20CL
 	if (lang == LANG_ID_SEC)
 	{
 		uint16_t ui = ((((uint16_t)&_SEC_LANG) + 0x00ff) & 0xff00); //table pointer
diff --git a/Firmware/language.h b/Firmware/language.h
index 24cc510d..d7bf53e0 100644
--- a/Firmware/language.h
+++ b/Firmware/language.h
@@ -108,6 +108,7 @@ extern uint8_t lang_select(uint8_t lang);
 
 //get total number of languages (primary + all in xflash)
 extern uint8_t lang_get_count();
+extern uint8_t lang_get_header(uint8_t lang, lang_table_header_t* header, uint32_t* offset);
 extern uint16_t lang_get_code(uint8_t lang);
 extern const char* lang_get_name_by_code(uint16_t code);
 
diff --git a/Firmware/messages.c b/Firmware/messages.c
index b931e643..e6ab5221 100644
--- a/Firmware/messages.c
+++ b/Firmware/messages.c
@@ -119,3 +119,4 @@ const char MSG_Z_MAX[] PROGMEM_N1 = "z_max: "; ////c=0 r=0
 const char MSG_Z_MIN[] PROGMEM_N1 = "z_min: "; ////c=0 r=0
 const char MSG_ZPROBE_OUT[] PROGMEM_N1 = "Z probe out. bed"; ////c=0 r=0
 const char MSG_ZPROBE_ZOFFSET[] PROGMEM_N1 = "Z Offset"; ////c=0 r=0
+const char MSG_TMC_OVERTEMP[] PROGMEM_N1 = "TMC DRIVER OVERTEMP"; ////c=0 r=0
diff --git a/Firmware/messages.h b/Firmware/messages.h
index f5910e9e..0b5b9b09 100644
--- a/Firmware/messages.h
+++ b/Firmware/messages.h
@@ -116,3 +116,4 @@ extern const char MSG_Z_MAX[];
 extern const char MSG_Z_MIN[];
 extern const char MSG_ZPROBE_OUT[];
 extern const char MSG_ZPROBE_ZOFFSET[];
+extern const char MSG_TMC_OVERTEMP[];
diff --git a/Firmware/temperature.cpp b/Firmware/temperature.cpp
index e0cacb99..83ead13b 100644
--- a/Firmware/temperature.cpp
+++ b/Firmware/temperature.cpp
@@ -832,7 +832,7 @@ static float analog2temp(int raw, uint8_t e) {
       SERIAL_ERROR_START;
       SERIAL_ERROR((int)e);
       SERIAL_ERRORLNPGM(" - Invalid extruder number !");
-      kill("", 6);
+      kill(PSTR(""), 6);
       return 0.0;
   } 
   #ifdef HEATER_0_USES_MAX6675
diff --git a/Firmware/tmc2130.cpp b/Firmware/tmc2130.cpp
index 01ee8fa2..b55beb9b 100644
--- a/Firmware/tmc2130.cpp
+++ b/Firmware/tmc2130.cpp
@@ -5,6 +5,7 @@
 #include "tmc2130.h"
 #include "LiquidCrystal_Prusa.h"
 #include "ultralcd.h"
+#include "language.h"
 #ifndef NEW_SPI
 #include <SPI.h>
 #else //NEW_SPI
@@ -386,7 +387,6 @@ bool tmc2130_wait_standstill_xy(int timeout)
 
 void tmc2130_check_overtemp()
 {
-	const static char TMC_OVERTEMP_MSG[] PROGMEM = "TMC DRIVER OVERTEMP ";
 	static uint32_t checktime = 0;
 	if (millis() - checktime > 1000 )
 	{
@@ -397,11 +397,11 @@ void tmc2130_check_overtemp()
 			tmc2130_rd(i, TMC2130_REG_DRV_STATUS, &drv_status);
 			if (drv_status & ((uint32_t)1 << 26))
 			{ // BIT 26 - over temp prewarning ~120C (+-20C)
-				SERIAL_ERRORRPGM(TMC_OVERTEMP_MSG);
+				SERIAL_ERRORRPGM(MSG_TMC_OVERTEMP);
 				SERIAL_ECHOLN(i);
 				for (int j = 0; j < 4; j++)
 					tmc2130_wr(j, TMC2130_REG_CHOPCONF, 0x00010000);
-				kill(TMC_OVERTEMP_MSG);
+				kill(MSG_TMC_OVERTEMP);
 			}
 
 		}
diff --git a/Firmware/ultralcd.cpp b/Firmware/ultralcd.cpp
index 0b803b55..eeb01fe1 100644
--- a/Firmware/ultralcd.cpp
+++ b/Firmware/ultralcd.cpp
@@ -5657,11 +5657,13 @@ void lcd_confirm_print()
 
 }
 
-extern void __test();
+extern void __test(uint8_t lang);
 
 static void lcd_test_menu()
 {
-	__test();
+	__test(3);
+	lcd_update_enable(true);
+	lcd_return_to_status();
 }
 
 static void lcd_main_menu()
@@ -5833,7 +5835,7 @@ static void lcd_main_menu()
 #endif
 
   MENU_ITEM(submenu, _i("Support"), lcd_support_menu);////MSG_SUPPORT c=0 r=0
-//  MENU_ITEM(submenu, _i("Test"), lcd_test_menu);////MSG_SUPPORT c=0 r=0
+  MENU_ITEM(submenu, _i("Test"), lcd_test_menu);////MSG_SUPPORT c=0 r=0
 
   END_MENU();
 
diff --git a/Firmware/variants/1_75mm_MK3-EINSy10a-E3Dv6full.h b/Firmware/variants/1_75mm_MK3-EINSy10a-E3Dv6full.h
index 856b5ab0..8d3a975d 100644
--- a/Firmware/variants/1_75mm_MK3-EINSy10a-E3Dv6full.h
+++ b/Firmware/variants/1_75mm_MK3-EINSy10a-E3Dv6full.h
@@ -149,6 +149,7 @@
 
 //#define DEBUG_BUILD
 //#define DEBUG_SEC_LANG   //secondary language debug output at startup
+//#define DEBUG_W25X20CL   //debug external spi flash
 #ifdef DEBUG_BUILD
 //#define _NO_ASM
 #define DEBUG_DCODES //D codes
diff --git a/Firmware/w25x20cl.c b/Firmware/w25x20cl.c
index 04f0d402..611897fe 100644
--- a/Firmware/w25x20cl.c
+++ b/Firmware/w25x20cl.c
@@ -36,17 +36,18 @@
 
 //#define _SPI_TX swspi_tx
 //#define _SPI_RX swspi_rx
-#define _SPI_TX(b) spi_txrx(b)
-#define _SPI_RX() spi_txrx(0xff)
+#define _SPI_TX(b)   spi_txrx(b)
+#define _SPI_RX()    spi_txrx(0xff)
 
 
 int w25x20cl_mfrid_devid(void);
 
 
-int8_t w25x20cl_ini(void)
+int8_t w25x20cl_init(void)
 {
 	PIN_OUT(W25X20CL_PIN_CS);
 	_CS_HIGH();
+	W25X20CL_SPI_ENTER();
 	if (!w25x20cl_mfrid_devid()) return 0;
 	return 1;
 }
diff --git a/Firmware/w25x20cl.h b/Firmware/w25x20cl.h
index 72a0ddde..21294a21 100644
--- a/Firmware/w25x20cl.h
+++ b/Firmware/w25x20cl.h
@@ -6,20 +6,21 @@
 #include "config.h"
 
 
-#define W25_STATUS_BUSY   0x01
-#define W25_STATUS_WEL    0x02
-#define W25_STATUS_BP0    0x04
-#define W25_STATUS_BP1    0x08
-#define W25_STATUS_TB     0x20
-#define W25_STATUS_SRP    0x80
+#define W25X20CL_STATUS_BUSY   0x01
+#define W25X20CL_STATUS_WEL    0x02
+#define W25X20CL_STATUS_BP0    0x04
+#define W25X20CL_STATUS_BP1    0x08
+#define W25X20CL_STATUS_TB     0x20
+#define W25X20CL_STATUS_SRP    0x80
 
+#define W25X20CL_SPI_ENTER() spi_setup(W25X20CL_SPCR, W25X20CL_SPSR)
 
 #if defined(__cplusplus)
 extern "C" {
 #endif //defined(__cplusplus)
 
 
-extern int8_t w25x20cl_ini(void);
+extern int8_t w25x20cl_init(void);
 extern void w25x20cl_enable_wr(void);
 extern void w25x20cl_disable_wr(void);
 extern uint8_t w25x20cl_rd_status_reg(void);