[BUG] MARLINUI doesn't change language with MKS_TS35_V2_0

[anomalchik]

Did you test the latest bugfix-2.1.x code?

Yes, and the problem still exists.

Bug Description

UI language does not change

Bug Timeline

No response

Expected behavior

No response

Actual behavior

Running with English language.

Steps to Reproduce

1. #define MKS_TS35_V2_0
2. #define TFT_COLOR_UI
3. #define DISPLAY_CHARSET_HD44780 CYRILLIC
4. #define LCD_LANGUAGE ru
5. uncomment CONFIG_EXPORT in Configuration_adv
6. compile firmware
7. check exported configuration and you will see that the DISPLAY_CHARSET_HD44780 and LCD_LANGUAGE parameters have not been exported

Version of Marlin Firmware

bugfix-2.1.x (2024-09-29)

Printer model

Custom

Electronics

BOARD_MKS_ROBIN_NANO_V3

LCD/Controller

MKS_TS35_V2_0

Other add-ons

No response

Bed Leveling

None

Your Slicer

None

Host Software

None

Don't forget to include

• A ZIP file containing your Configuration.h and Configuration_adv.h.

Additional information & file uploads

config.zip

[ellensp]

HD44780 is for character LCD displays so #define DISPLAY_CHARSET_HD44780 CYRILLIC is not used.

but your correct #define LCD_LANGUAGE ru is not working.

Marlin has this line which incorrectly removes LCD_LANGUAGE

#if NONE(HAS_MARLINUI_U8GLIB, HAS_TFT_LVGL_UI, DGUS_LCD_UI_E3S1PRO)
  #undef LCD_LANGUAGE
#endif

update Marlin/src/inc/Conditionals-2-LCD.h with this code seems like a good fix.

#if NONE(HAS_MARLINUI_U8GLIB, HAS_TFT_LVGL_UI, TFT_COLOR_UI, DGUS_LCD_UI_E3S1PRO)
  #undef LCD_LANGUAGE
#endif

[ellensp]

I have created a PR to fix this going forward.