Make MAPPER_NON the fall back mapper - if no other is defined.
One list less to maintain.

・Add new translation
・Change translation

・Add new translation

・Add new translation
・Add translation for 16 width ASCII LCD
・Change translation
・Revert translation from Japanese to English
・Fix typo

・Remove abolished strings (MSG_NOZZLE1, MSG_NOZZLE2)
・Remove duplicated strings 
・Arrange the strings in unified order
・Adjust spacing
・Remove some comments in Japanese files(follow-up the PR #3560)

The most part of these changes were salvaged from closed my PR#3550.

Update and change Japanese translation

・Follow-up the PR #3411(Update Readme.fonts about Kana), Remove "who really..." strings. I had forgotten it.
・Add readable translated strings in comment
・Add Japanese translation.
  MSG_LCD_ENDSTOPS "エンドストップ"
  (utf8 version only. Because non-utf8 version ("ｴﾝﾄﾞｽﾄｯﾌﾟ") over 8 characters)
・Change translation.
  MSG_ACC "カソクド mm/s2"
  MSG_ACC "\xb6\xbf\xb8\xc4\xde mm/s2" ("ｶｿｸﾄﾞ mm/s2")

Follow the PR #3242.

In all these cases we want the axis to be homed. If we could have lost
some steps is secondary.

Reenables homing seperate axis with DISABLE_X / DISABLE_Y true.

Following up on #3231

documentation/LCDLanguageFont.md moved to http://www.marlinfirmware.org/ at commit 12d0983757,
but http://www.marlinfirmware.org/ isn't working.

Keep "astyled" reformatting

Apply `ENABLED` / `DISABLED` macros to language-related files.

* Added MSG_END_HOUR and MSG_END_MINUTE labels to all language files.
* Available translations:
  EN, FR, DE, ES, IT, PT, PT-BR.

Automatic selection was to unflexible.

Updated documentation

Updated language files to new logic and documentation.

Updated bdf2u8g.exe

And made falback to kana work.