bgr -> bg

+ update in documentation

Documentation/LCDLanguageFont.md

   * de    German
   * es    Spanish
   * ru    Russian
-  * bgr   Bulgarian
+  * bg    Bulgarian
   * it    Italian
   * pt    Portuguese
   * pt-br Portuguese (Brazil)
       * MAPPER_NON is the fastest and least memory consuming variant.
       * Mappers together with a ISO10646_font are the second best choice regarding speed and memory consumption. Only a few more decisions are mad per character.
       * Mappers together with the HD44780_fonts use about additional 128 bytes for the mapping_table.
-  * e.) Creating a new language file is not a big thing. Just make a new file with the format 'language_xx.h' or maybe 'language.xx.utf8.h', define a mapper and a font in there and translate some of the strings defined in language_en.h. You can drop the surrounding  #ifndef #endif. You don't have to translate all the stings - the missing one will be added by language_en.h - in English - of cause.
+  * e.) Creating a new language file is not a big thing. Just make a new file with the format 'language_xx.h' or maybe 'language.xx.utf8.h', define a mapper and a font in there and translate some of the strings defined in language_en.h. You can drop the surrounding  #ifndef #endif. You don't have to translate all the stings - the missing one will be added by language_en.h - in English - of cause. If possible 'xx' should be the 2 letter code from ISO 639-1 for your language.
   * f.) If you cant find a matching mapper things will be a bit more complex. With the Hitachi based displays you will not have big chance to make something useful unless you have one with a matching charset. For a full graphic display - lets explain with - let's say Greece.
       Find a matching charset. (http://en.wikipedia.org/wiki/Greek_and_Coptic)
       Provide a font containing the symbols in the right size. Normal ASCII in the lower 127 places, the upper with your selection.

Marlin/Configuration.h

 // @section lcd
 
 // Define your display language below. Replace (en) with your language code and uncomment.
-// en, pl, fr, de, es, ru, bgr, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
+// en, pl, fr, de, es, ru, bg, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
 // See also language.h
 #define LANGUAGE_INCLUDE GENERATE_LANGUAGE_INCLUDE(en)
 

Marlin/configurator/config/Configuration.h

 // @section lcd
 
 // Define your display language below. Replace (en) with your language code and uncomment.
-// en, pl, fr, de, es, ru, bgr, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
+// en, pl, fr, de, es, ru, bg, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
 // See also language.h
 #define LANGUAGE_INCLUDE GENERATE_LANGUAGE_INCLUDE(en)
 

Marlin/example_configurations/Felix/Configuration.h

 //==============================LCD and SD support=============================
 
 // Define your display language below. Replace (en) with your language code and uncomment.
-// en, pl, fr, de, es, ru, bgr, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
+// en, pl, fr, de, es, ru, bg, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
 // See also language.h
 //#define LANGUAGE_INCLUDE GENERATE_LANGUAGE_INCLUDE(en)
 

Marlin/example_configurations/Felix/Configuration_DUAL.h

 //==============================LCD and SD support=============================
 
 // Define your display language below. Replace (en) with your language code and uncomment.
-// en, pl, fr, de, es, ru, bgr, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
+// en, pl, fr, de, es, ru, bg, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
 // See also language.h
 //#define LANGUAGE_INCLUDE GENERATE_LANGUAGE_INCLUDE(en)
 

Marlin/example_configurations/Hephestos/Configuration.h

 //==============================LCD and SD support=============================
 
 // Define your display language below. Replace (en) with your language code and uncomment.
-// en, pl, fr, de, es, ru, bgr, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
+// en, pl, fr, de, es, ru, bg, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
 // See also language.h
 //#define LANGUAGE_INCLUDE GENERATE_LANGUAGE_INCLUDE(en)
 

Marlin/example_configurations/K8200/Configuration.h

 //==============================LCD and SD support=============================
 
 // Define your display language below. Replace (en) with your language code and uncomment.
-// en, pl, fr, de, es, ru, bgr, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
+// en, pl, fr, de, es, ru, bg, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
 // See also language.h
 //#define LANGUAGE_INCLUDE GENERATE_LANGUAGE_INCLUDE(en)
 

Marlin/example_configurations/SCARA/Configuration.h

 //==============================LCD and SD support=============================
 
 // Define your display language below. Replace (en) with your language code and uncomment.
-// en, pl, fr, de, es, ru, bgr, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
+// en, pl, fr, de, es, ru, bg, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
 // See also language.h
 //#define LANGUAGE_INCLUDE GENERATE_LANGUAGE_INCLUDE(en)
 

Marlin/example_configurations/WITBOX/Configuration.h

 //==============================LCD and SD support=============================
 
 // Define your display language below. Replace (en) with your language code and uncomment.
-// en, pl, fr, de, es, ru, bgr, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
+// en, pl, fr, de, es, ru, bg, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
 // See also language.h
 //#define LANGUAGE_INCLUDE GENERATE_LANGUAGE_INCLUDE(en)
 

Marlin/example_configurations/delta/generic/Configuration.h

 //==============================LCD and SD support=============================
 
 // Define your display language below. Replace (en) with your language code and uncomment.
-// en, pl, fr, de, es, ru, bgr, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
+// en, pl, fr, de, es, ru, bg, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
 // See also language.h
 #define LANGUAGE_INCLUDE GENERATE_LANGUAGE_INCLUDE(en)
 

Marlin/example_configurations/delta/kossel_mini/Configuration.h

 //==============================LCD and SD support=============================
 
 // Define your display language below. Replace (en) with your language code and uncomment.
-// en, pl, fr, de, es, ru, bgr, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
+// en, pl, fr, de, es, ru, bg, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
 // See also language.h
 #define LANGUAGE_INCLUDE GENERATE_LANGUAGE_INCLUDE(en)
 

Marlin/example_configurations/makibox/Configuration.h

 //==============================LCD and SD support=============================
 
 // Define your display language below. Replace (en) with your language code and uncomment.
-// en, pl, fr, de, es, ru, bgr, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
+// en, pl, fr, de, es, ru, bg, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
 // See also language.h
 //#define LANGUAGE_INCLUDE GENERATE_LANGUAGE_INCLUDE(en)
 

Marlin/example_configurations/tvrrug/Round2/Configuration.h

 //==============================LCD and SD support=============================
 
 // Define your display language below. Replace (en) with your language code and uncomment.
-// en, pl, fr, de, es, ru, bgr, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
+// en, pl, fr, de, es, ru, bg, it, pt, pt-br, fi, an, nl, ca, eu, kana, kana_utf8, test
 // See also language.h
 //#define LANGUAGE_INCLUDE GENERATE_LANGUAGE_INCLUDE(en)
 

Marlin/language.h

 // de       German
 // es       Spanish
 // ru       Russian
-// bgr      Bulgarian
+// bg       Bulgarian
 // it       Italian
 // pt       Portuguese
 // pt-br    Portuguese (Brazil)