Update Readme.fonts about Kana

Update to language_it.h

I think that that sentence has been completed its part. 
Because Kana fonts were revised by me the other day(PR #3289), who am a native Japanese.

And for @AnHardt,
I'd like to take this opportunity to express one's heartfelt gratitude as a far eastern person,
about you has been maintaining the resource of Japanese despite you are a far western person.

Rc bug fix

Add more leveling-debug output

Final tweaks to M111 output

Catch a TEMP_SENSOR error before a pins issue

Revert #3388, clean up lcd_move code

Update DEFAULT_SOURCE_URL comment

Update language_it.h

Some omitted french translation

New messages translated:
#define MSG_LEVEL_BED_HOMING "Homing XYZ"
#define MSG_LEVEL_BED_WAITING "Click to Begin"
#define MSG_LEVEL_BED_DONE "Leveling Done!"
#define MSG_LEVEL_BED_CANCEL "Cancel"
. . .
#define MSG_HOME_OFFSETS_APPLIED "Offsets applied"

Comments for legibility, include DEBUG_LEVELING, SDSUPPORT

Fix: menu edit items saving position twice

Drop DISABLE_M(IN|AX)_ENDSTOPS, replace with individual endstop flags

Added a script to check all language files for missing translations

Add Missing Spanish translation

Update language_nl.h

Add the missing translation (Spanish) issue #3353

Added these messages with Dutch translation
#define MSG_BED_Z
#define MSG_A_TRAVEL
#define MSG_HEATING_FAILED_LCD
#define MSG_ERR_REDUNDANT_TEMP
#define MSG_THERMAL_RUNAWAY
#define MSG_ERR_MAXTEMP
#define MSG_ERR_MINTEMP
#define MSG_ERR_MAXTEMP_BED
#define MSG_ERR_MINTEMP_BED
#define MSG_HEATING
#define MSG_HEATING_COMPLETE
#define MSG_BED_HEATING
#define MSG_BED_DONE

French translation

Update language_cz.h

Update language_it.h